Since October 2006 “Old Swan” has been posting an excellent blog on NMR software. It can be found at nmr-software.blogspot.com
It makes very interesting reading … though I’m not always sure what is going on – see the December 11th posting
Industrial NMR Spectroscopy Applications
by process nmr NMR
Since October 2006 “Old Swan” has been posting an excellent blog on NMR software. It can be found at nmr-software.blogspot.com
It makes very interesting reading … though I’m not always sure what is going on – see the December 11th posting
A new website has been introduced that focusses on the applications of Magnetic Resonance (NMR, MRI, Relaxometry) to the chemistry and physics of foods. The website can be found at magres.foodsciences.org
This organization also arranges the biannual conference on Application of Magnetic Resonance in Food Science – they have an excellent poster session with PDF versions of the poster presentations published to the web – Poster PDFs
I have recently been forced into moving the blog site to a new server. The entire blog history has been placed in a single update. Sorry for any inconvenience this might cause.
Below are the entries from November 2005- September 2006
September 27, 2006
CCQTP is an association with members that span multiple segments of the Canadian oil industry -it’s history, mission, and membership can be found at the site.
On a related note an excellent technical site dealing with crude oil quality issues cane be found at the Crude Oil Quality Group website, which is a consortium with the following membership, dedicated to developing test methods and quality standards for crude oil trading that go well beyond the traditional gravity and sulfur measurements currently used. There are many additives, processing fluids, corrosive materials that can be found in crude oils that can cause processing issues for the buyer who purchases simply based on density and sulfur. The group has made public much of it’s meeting agenda archives and the presentations given at those meetings. It is an interesting read for those interested in petroleum chemistry issues.
At PNA we have been developing some high field and low field NMR techniques, looking at chemistry and relaxation in crude oils with naphthenic acid and corrosion issues. We would be interested in hearing from anyone interested in woprking with us to develop a relatively straight forward method for NAN and TAN analysis by NMR methods.
There is also an excellent link to a paper on the quantitative NMR of natural products.
Joint venture for HTS-110
A new joint venture between HTS-110 and US company Progression Inc will provide customers with a unique high temperature superconducting (HTS) magnet capability.
1 May 2006
HTS-110 Limited, an affiliated company of Industrial Research, focuses on HTS solutions for medical, scientific, energy, defence, transport and industrial markets. Progression is a world leader in the development and implementation of process Nuclear Magnetic Resonance (NMR) technologies, Laser Induced Breakdown Spectroscopy (LIBS) techniques, and Laser Induced Fluorescence (LIF) analysers for the mining, petrochemical, and polymer/polyolefin industries.
The new venture, Progression-HTS-110, will provide customers with unique high temperature superconducting (HTS) magnet capability. The new series of analyser will operate at 80MHz with the field strength of 2 Tesla generated by a HTS magnet.
Target markets for the analyser will include refining applications in the oil and gas industry, educational research and development, pharmaceutical and biochemistry applications.
Chief executive of Progression, Vaughn E. Davis, says the company is looking forward to working with HTS-110 Ltd and describes the deal as the perfect complementary vehicle to extend and build on the unique strengths of Progression’s leading market position in process NMR.
Chief executive of HTS-110, Dr Sohail Choudhry, says it is a strategic move to partner with Progression and extend HTS-110’s leading-edge technology into new markets.
“HTS is an advanced and rapidly developing new technology and we look forward to using that as a key driver for expanding the marketplace with Progression.
“Progression is an innovative company and we share a similar culture – that will work to our advantage and allow us to benefit from both our unique and complementary skills.”
It is anticipated the new company will be headquartered in Houston, Texas, under the leadership of Mr. Scott Simmons.
HTS-110 is a subsidiary company of Industrial Research Ltd – it’s HTS magnet technologies are described here.
Experiencing Process MRA Industrial Lube Plant Application – Roberto Giardino1, Silvia Guanziroli1, Cinzia Passerini1, and Antonio Farina2. (1) EniTecnologie S.p.A, via Maritano, 26, San Donato M.se (MI), 20097, Italy, (2) Divisione Refining & Marketing – Raffineria di Livorno, Eni S.p.A, via Aurelia, 7, 57017 Stagno (LI), Italy
In a conventional base oil production plant the operating conditions needed to produce products at a desired specification are very sensitive to feed quality. At Livorno refinery an on-line Process Magnetic Resonance Analyzer (MRA) has been installed to identify the feedstock and product composition and properly set an advanced process control system. By using MRA it is possible to reduce the product quality give-away due to feed quality variation. In this work the industrial experience acquired is reported.
Characterization, On-Line Monitoring, and Sensing of Petroleums and Petrochemicals 8:30 AM-11:30 AM, Thursday, 14 September 2006 Sheraton Palace—Telegraph Hill
Division of Petroleum ChemistryThe 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006
Solid Fat Content (SFC) Analysis
The quality of food products containing fats and oils depends on solid fat content (SFC). SFC determination is an essential measurement in the baking, confectionery, and fat industries. NMR has been established as the method for SFC determination by ISO 8292. Measurements of SFC by the Spin Track NMR analyzer can be performed quickly and accurately with great benefit for the manufacturer.
Simultaneous Rapid-Determination of Oil and Water in Seeds
Sunflower, soybean, groundnut, rape and mustard are appreciated for their oil content, but excess of water content reduces their price. Thus, an accurate and fast determination of oil and water content is important to both manufacturers and customers. The Spin Track NMR analyzer meets ISO 10565 requirements and gives the possibility to simultaneously determine of oil and water content.
Oil/Fat and Moisture analysis in Chocolate, Powdered Milk, Cheese and other Food Products
Time of storage of food products depends strongly on moisture content. Excess moisture leads to microbiological activity and can make food consumption dangerous. Fat and moisture content also heavily influence taste. Manufacturers are also regulated to disclose the exact information on the fat content of their products. NMR is the most rapid and exact method to determine these essential parameters. The Spin Track NMR analyzer is especially suitable for regular analysis of food quality.
Curing Degree and Elasticity Analysis in Rubber-Type Materials
Over the past years Rheology has become widely accepted as a tool in the investigation of rubber properties. However, rheological testing equipment can be extremely expensive and complicated. NMR is very sensitive to the structure and properties of investigated rubber materials. The Spin Track NMR-analyzer allows investigators to obtain data complementary to rheology and can also prove to be more informative.
Moisture and Crystallinity Analysis in Polysaccharides
Polysaccharides like chitin, chitosan etc. are widely used because of inherent unique properties. Adsorbents and food bio-additions based on them require a regular check of quality. Spin Track NMR-analyzer allows investigators to obtain information about moisture, crystallinity, purity and structure of polysaccharides.
Porosity of Rock Cores/Heterogeneous Catalysts/Zeolites
The possibility of oil development can be defined more exactly in the initial stages of exploration by using NMR. Rock cores saturated by bitumen or water provide information on degree of saturation, structure of saturating compounds, porosity, and diffusion characteristics. This information allows the prediction of oil production yields. The Spin Track NMR-analyzer with a 35mm probe gives the possibility to obtain such information.
Scientific applications
The spectrometer’s Relax software allows construction of many types of NMR pulse sequences, user-defined interfaces, data processing (digital experiments filtering, fitting, Fourier and Laplace transforms) and data manipulations. Thus, customers can directly run automated standard type NMR experiments just by “pressing one button” in the program shell, or create new applications using the powerful pascal-like script language. Widely used experiments like measurements of T1 and T2 (90-tau-90, 180-tau-90, CPMG, FID, Spin Echo, Solid-Echo) are included into the Relax software as default examples. The NMR measurements can be accompanied with the high precision calibration samples and built-in software calibration procedures. Easy automatic tuning of the NMR frequency, pulse-durations, TX power and RX gain is included into the software package.
Spin Track meets the requirements of many relaxation and diffusion based NMR analyses:
Food industry (Solid Fat Content Analysis, Dairy Products, Oil and Moisture in Chocolate, Powdered Milk, Cheese and other food products; Oil and Moisture in seeds, Emulsion Characteristics)
Lipid Analysis – Fatty Acid Distribution
Cellulose and paper manufacturing (Moisture/Crystallinity Analysis, investigations of ageing effects)
Oil industry (rock cores analysis, oil-water, oil-water-gas, viscosity, physical property correlation, )
Polymer and rubber industry (Curing degree and elasticity analysis, polymer ageing, glass transition, amorphous/crystalline content)
Chemical industry (Density, Melting Points, Copolymer Ratios, Compatibility, Cure, Cross Linking, H or F content,
Medicine (NMR Surface Analysis of Patients, Plasma Analysis)
Environmental (Water Pollution, Forest Degradation, Soils, Fertilizers)
Fibers – Moisture and Finish Content
Pharmaceuticals (Tablet Analysis, Coatings/Components/Moisture, Hydrogen/Fluorine/Sodium Content)
Relaxation, Diffusion, Particle Size, Pore Size Distribution
Utilization of mobile NMR measurement equipment from Process NMR Associates provides the following advantages:
Reduction of expenses associated with meeting quality requirements of products
Simplicity of use in routine production measurements and in advanced laboratories for complicated analysis
Mobility of the hardware and low cost for the overall device
Non-invasive measurements of any sample
Hardware solutions for non-standard NMR applications
Permanent technical support and comprehensive scientific consulting
Fair price and absolute ease of operation!
Portable Low-Resolution NMR Analyzer
Analyzer is designed to perform:
All standard NMR applications
Development of new NMR-based techniques
Teaching quantum physics, NMR, analytical chemistry in Universities and Colleges
NMR analyzer Spin Track comprises functional parts (probes, preamplifier and duplexer, TX Power Amplifier, Sequence Generator and PC Interface, Data Acquisition System, NMR Transceiver) which can be purchased separately and used for the specific needs of an advanced customer (see example of connection assembly). Depending on the required magnet system the Spin Track can be used as NMR relaxometer or high resolution NMR spectrometer.
Basic characteristics of Spin Track analyzer:
Frequency range of the NMR spectrometer module: 5..60 MHz
Ringing time for 10 mm NMR probe is 8 ms
Probe tube diameter: up to 35 mm
Changeable preamplifiers and 50 Ohm matched duplexers with self bandwidth of 5 MHz
Customer-defined set of sensors (5, 10 and 30mm test-tube magnet systems, NMR surface sensors)
Adjustable TX output power up to 400 Watts
Adjustable RX channel gain up to 107
RX Sensitivity better than 1 mV (conditions: signal to noise ratio 3)
Adjustable digital filter bandwidth from 100 Hz up to 1 MHz
Pulse sequence length up to 64K events with resolution 100 ns
Quadrature 64Kx10-bit data acquisition system
Complete control of functions via personal computer – USB 2.0 Connectivity
Fast sensors replacement
Compatible with all Microsoft® Windows® operating systems
Software
The product software, Relax, is a powerful tool containing many standard NMR relaxation routines and applications, and can also be used to create new pulse-sequences, pulsed field gradients, gains and attenuations, post-processing methodolgies of considerable complexity. The built-in script language is based on a widespread Pascal syntax and is enriched with commands for fitting, Fourier and Laplace transforms, Low-pass filtering, etc. The script supports dialogue windows, static messages, user-defined diagrams, data manipulation procedures. Relax also allows direct processing of data obtained when utilizing Spin Track as a high-resolution NMR spectrometer.
Stationary Low-Resolution TD-NMR Analyzer
Analyzer is designed to perform:
Standard routine NMR applications
Development of new NMR-based techniques
Teaching quantum physics, NMR, and analytical chemistry in Universities and Colleges
The Spin Track Stationary fulfills all requirements to conduct NMR measurements like portable version of NMR analyzer.
In addition it is supplied with the possibility for increased probe volume to facilitate excellent statistical averaging of experimental results or to accomodate large samples.
Basic characteristics of Stationary Spin Track Analyzer:
Frequency range of the NMR spectrometer module: 5..60 MHz
Ringing time for 10 mm NMR probe is 8 ms
Probe tube diameter: up to 35 mm
Changeable preamplifiers and 50 Ohm matched duplexers with self bandwidth of 5 MHz
Customer-defined set of sensors (5, 10 and 30mm test-tube magnet systems, NMR surface sensors)
Adjustable TX output power up to 400 Watts
Adjustable RX channel gain up to 107
RX Sensitivity better than 1 mV (conditions: signal to noise ratio 3)
Adjustable digital filter bandwidth from 100 Hz up to 1 MHz
Pulse sequence length up to 64K events with resolution 100 ns
Quadrature 64Kx10-bit data acquisition system
Complete control of functions via personal computer – USB 2.0 Connectivity
Fast sensors replacement
Compatible with all Microsoft® Windows® operating systems
Relax Software
Educational Low-Resolution TD-NMR Spectrometer
Analyzer is designed to demonstrate NMR spin dynamics as well as provide a basic platform for undergraduate level chemistry and physics labs.
Standard routine NMR applications (FID, Spin Echo, CPMG, Carr-Purcell, T1-Determination (90-90 or inversion recovery))
Development of new NMR-based techniques – software allows development of pulse sequences by students without risk of instrument damage.
Teaching quantum physics, NMR, and analytical chemistry in Universities and Colleges
Basic characteristics of Stationary Spin Track Analyzer:
Frequency range of the NMR spectrometer module: 10..20 MHz
NMR Probe tube diameter: 5 mm
10-20 MHz Magnets, Surface NMR Sensors
Changeable preamplifiers and 50 Ohm matched duplexers with self bandwidth of 5 MHz
Adjustable TX output power up to 100 Watts
Adjustable RX channel gain up to 107
RX Sensitivity better than 1 mV (conditions: signal to noise ratio 3)
Adjustable digital filter bandwidth from 100 Hz up to 1 MHz
Pulse sequence length up to 64K events with resolution 100 ns
Quadrature 64Kx10-bit data acquisition system
Complete control of functions via personal computer – USB 2.0 Connectivity
Compatible with all Microsoft® Windows® operating systems
Relax Software
Custom NMR Components
For NMR engineers and advanced specialists Process NMR Associates offers accessories to upgrade, modernize, or build new NMR related devices (see connection example). All modules can be purchased separately and modules can be developed with unique characteristics to fulfill special requirements of the customer.
Surface NMR Sensors NMR Sequence Generator
Data Acquisition Unit Wide-Band NMR Transceiver
NMR Power Amplifier NMR Pre-Amplifiers and Duplexers
For more information and pricing please contact John Edwards
Back to Process NMR Associates Home Page
Process NMR Associates can guide you through this maze of choices.
Mestrec laboratories also offer a cheap (50/100 Euro) software package that is available at iNMR.
The AMMRL has a website with some basic information at http://chemnmr.colorado.edu/ammrl/ and has an invaluable archive of “user group” e-mails that discuss all aspects of running and maintaining an NMR facility (Email – Archives 1993-Present). If you have a question about instrument problems, instrument and cryogen maintenance, user training, user competency, safety issues, etc …. chances are the answers are already included in this database. The database can also be searched by key word to arrive at “on-topic” material.
May 18th, 2006
This is one of the siblings of the magnets that we operate in our labortory at Process NMR Associates. The site is only for those with a strong stomach.
May 16th, 2006
May 3rd, 2006
May 3rd, 2006
April 26th, 2006
April 1st, 2006
Energy Technologies for the Twenty-First Century
WEC – Survey of Energy Resources 2001
DOE – This Week in Petroleum
Energy Information Administration – Main Site
March 15th, 2006
March 14th, 2006
March 14th, 2006
March 13th, 2006
The free lecture is open to the public and is part of Sigma XI Special Seminar Series.
From gasoline manufacturing to butter production, more than 140 online NMRs have been placed in manufacturing plants worldwide. Giammatteo will discuss installation and utilization of this technology, its application in the petroleum and petrochemical industries and the future in pharmaceuticals.
Giammatteo co-founded Process NMR Associates, based in Danbury, in 1997. He previously worked for Texaco for 17 years. Giammatteo received his doctorate in chemistry from Wesleyan University and has published and presented more than 30 papers.
For more information, contact James Kirby, associate professor of chemistry at Quinnipiac, at (203) 582-8275 or James.Kirby@quinnipiac.edu
March 10th, 2006
Quantification by 1H NMR of Fatty Acids and Their Derivatives – by G. Knothe – USDA
An incredible repository of NMR information related to 1H and 13C NMR of Fatty Acids and their derivatives is found at the Lipid Library.
March 10th, 2006
March 10th, 2006
“Oil Sands: Alberta’s Opportunity to Become a Significant Oil Exporter” – by Fluor, February 2004.
National Center for Upgrading Technology – Conference on “Upgrading and Refining of Heavy Oil, Bitumen and Synthetic Crude Oil” – September 2006 – Details
“Bitumen and Very Heavy Crude Upgrading Technology – A Review of Long Term R&D Opportunities” March 2004
Genoil demonstration of an upgraded bitumen – effects on TBP and other physical properties.
“Fueling an Integrated Energy Future” – Energy Innovation Network, December 2004
Kearl Lake Bitumen Extraction Project
“Historical Perspective of the Heavy Oil Resources of Utah”
USGS – “Heavy Oil and Natural Bitumen-Strategic Petroleum Resources”
“Non-Conventional Hydrocarbons – Where and How Much”
Energy Independence for North America Through Heavy Oil Upgrading – Presentation – same material but presented as a Paper
Alberta Energy Research Institute – Strategic Research Plan
Shell – Gasification in Heavy Oil Upgrading in Alberta
“The Impact of Emerging Research Techniques on Exploitation and Refining Technology Development” John Shaw – University of Alberta
“Alberta’s Oils Sands Opportunity”
Jacobs Engineering – Oils Sands Production Presentation
Total – Tar Sands Production Presentation
Effect of Tar Sands on World Oil Supply – Imperial Oil
Association for the Study of Peak Oil & Gas
Alternative Fuels – An Energy technology Perspective – March 2005
“Integration Opportunities for Coal/Oil Coprocessing With Existing Refineries”
Oil Sands Supply Outlook – March 2004
March 9th, 2006
March 9th, 2006
March 1st, 2006
March 1st, 2006
Fossil fuel developments in Oil Shale, Tar Sands, and Coal Liquifaction will have to replace the “Easy Oil”. At $70 per barrel these are all plausible but research and development dollars have to be allocated. Running the world on Corn production is not the way to go technologically even though it satisfies the farming lobby.
March 1st, 2006
March 1st, 2006
March 1st, 2006
March 1st, 2006
February 26th, 2006
Applications of NMR to Food and Model Systems in Process Engineering
February 26th, 2006
Another strong proponent of NMR utilization in the study of petroleum hydrocarbons is G.S. Kapur of the Indian Oil Corporation. Here are a few of his papers:
1) “Analysis of Hydrocarbon mixtures by Diffusion Ordered Spectroscopy”, Fuel 79, 1347-51 (2000).
2)”The qualitative probing of hydrogen bond strength by diffusion-ordered NMR spectroscopy”, Tetrahedron Letters 41, 7181-7185 (2000).
3)“Unambigous Resolution of a-Methyl and a- Methylene Protons in 1H-NMR Spectra of Heavy Petroleum Fractions”, Energy Fuels 2005, 19, 508-511
4)”Simplification an assignment of proton and 2-dimensional hetero-correlated NMR spectra of petroleum fractions using gradient selected editing pulse sequences” Fuel 81 (2002) 883-892
A practical guide to PFG spin echo NMR for mixture analysis has been written by Brian Antelek of Eastman Kodak.
February 25th, 2006
February 25th, 2006
February 23rd, 2006
February 23rd, 2006
February 18th, 2006
Experimental
At the present time samples are being run on a Varian UnityPlus-200 spectrometer operating at a 29Si frequency of 39.74 MHz. The probe was a Doty Scientific 7 mm Supersonic CP/MAS probe using zirconia and Kel-F end caps. For the single pulse NMR experiments a pi/6 pulse of 2 microseconds was used with a relaxation delay of 4 seconds to facilitate quicker acquisition.The 4 second relaxation delay was obatined from full T1-inversion recovery experiments. Gated proton decoupling was used during FID acquisition. For the cross polarization experiments full contact time array experiments were obtained on the initial samples submitted. Due to the mobility of the polymer backbone the optimum cross polarization contact time for the polymer backbone was around 15 ms with signal lasting until 50+ ms. However, the more rigid structures in the polymer – such as the silicates, had optimum contact times around 3-5 ms. As a compromise we chose a 6.4 ms contact time which yielded good signal sensitivity for both the polymer and silicate components. Cross polarization inversion recovery experiments yielded a short relaxation delay of 2 seconds. A 1H p/2 pulse of 4.6 ms was used along with gated proton decouplind during FID acquisition. For all samples the same experimental conditions have been maintained. MAS spinning speeds were around 7 kHz to avoid spinning side band coincidence on real signals. Also, to avoid MAS induced modulation of the contact-time, the variable amplitude cross-polarization contact pulse was used.
Silicone Chemistry Observed by NMR
The notation in use for silicone chemistry is M,D,T,Q (mono, di, tri and quaternary) denoting the oxygen substitution on the silicon atom. The polymer backbone itself is predominantly D i.e. [(SiO2(CH3)2]n which has a typical resonance frequency around –21 ppm. The termination of the polymer would be an M group (SiO(CH3)3) (found at +4 to +10 ppm) or MOH (SiO(CH3)2OH) (-10 to –15 ppm). Another area of interest in the spectrum is the –20 to –10 ppm region which is partially due to MOH but also due to D type silicon centers that are within 5 monomer units of a termination. Thus, if hydrolysis of the silicone backbone is occuring, this region will increase in intensity as one will now have more silicon centers close to termination points as well as more MOH terminations.
In some gaskets one observes small signals in the –60 to –70 ppm region which is due to T type silicone centers (SiO3(CH3))n, however this is usually not observed. The only other region where one observes signal is in the –80 to –120 ppm region of the spectrum. These silicon centers can only be Q1 (SiO(OH)3), Q2 (SiO2(OH)2), Q3 (Si(OSi)3(OH)) or Q4 (SiO4)types, as only silicons with 4 attached oxygens can appear in this region, any methyl substitution would cause these silicons to appear in the +10 to –70 ppm range of the spectrum. Of relevance to any discussions on silicone polymers it should be noted that Q1 is equivalent to M(OH)3 , Q2 is equivalent to D(OH)2 , Q3 is equivalent to TOH.
When one looks at the NMR experiments for the certain silicones one does not observe a resonance at +10 to +4 ppm. This indicates that the predominant polymer termination is MOH. Silicate is observed, however, it is not clear if this silicate is a filler for hydrogen bonding crosslinking or actual polymer Q4/Q3/Q2 sites of directly condensed silicates acting as bonded crosslinking agents.
SP-MAS NMR Experiments
In this experiment one quantitatively observes all silicon species in the system allowing a “bulk” silicon type distribution to be calculated. One observes a narrow resonance at –21 ppm which is due to the silicone polymer backbone (-O-Si(CH3)2-O-)n. Very little signal is observed in the –20 to –10 ppm region indicating that the polymer chains are quite long. In the –80 to –120 ppm region of the spectrum one observes silicon present in silicate that has been added as a cross-linking agent. The hydrogen bonding between the silicone polymer and the Si-OH groups of the silicate add structural integrity to the gasket. It is differences in the silicate silanol (Si-OH) chemistry that may account for changes in compressibility of the gasket during service. Thus, one will observe relative changes in the amount of 29Si signal observed in the –80 to –103 ppm and –10 to –23 ppm regions of the spectrum. This region is where Q3 (Si(OSi)3(OH)), Q2 (Si(OSi)2(OH)2), and Q1 (Si(OSi)(OH)3) groups are found.
Parameters Calculated:
Silicate Content – %Si in silicate filler
Q4 – %Si atoms in Q4 silicate – Si(OSi)4
Qn – %Si atoms in Qn silicate (Q1, Q2, Q3)
Q4/Qn Ratio – Silanol (Si-OH) distribution
% Polymer – %Si in D & MOH polymer units
Relative changes in these parameters can be utilized to interpret changes in silicon chemistry caused by coolant exposure and service.
CP-MAS NMR Experiments
This experiment warrants a detailed explanation as the results are not quantitative from a “bulk” silicon chemistry standpoint. The CPMAS experiment utilizes the strong NMR signal that can be generated from protons (H) in the sample. The experiment preferentially observes silicons that are in close proximity to H. However, mobility is also a “problem” in this experiment. The way the experiment works is that the protons in the sample are polarized initially and magnetization is transferred from the protons to the silicons via their dipole-dipole interaction (similar to the interaction between 2 bar magnets). This interaction weakens the further the H and Si are from each other, and also weakens if there is considerable molecular motion. In the case of these samples this means that in the silicate region of the spectrum one observes an enhancement of the signal due to Si-OH containing species. In the case of the silicone polymer, however, one observes an overall decrease in the signal at –21 ppm due to the –(O-Si(CH3)2-O-)n backbone due to its rapid segmental (rubbery) molecular motions. One observes a large signal (that is hardly observable in the SPMAS spectra) in the –5 to –20 ppm region. This is due to silicone silicons that are at or directly adjacent to crosslinking sites (where there could be a D-silicate bond, or polymer termination sites such as MOH. The fact that they are enhanced by the CP technique indicates that these termination proximate silicons are motionally restricted compared to the rest of the silicone backbone. They represent either strongly hydrogen-bonded regions or chemical crosslinks of the type (O2(CH3)2Si–O–Si-O–Silicate) where a defect in the silicone backbone has reacted with a silanol of the silicate filler to form a Si-O-Si bond. This experiment is very powerful when used to observe relative changes in Si-OH chemistry in the silicate region and relative mobility changes in the polymer backbone.
Parameters Calculated:
% polymer backbone – %Si in mobile silicone backbone
% restricted polymer backbone – %Si in motionally restricted regions of the silicone backbone (D units in close proximity to cross-linking sites, termination sites (MOH) or adjacent to termination sites).
Silicate Content – %Si in silicate filler.
Q4 – %Si in Q4 silicate – Si(Osi)4
Qn – %Si in Qn silicate (Q1, Q2, Q3)
Q4/Qn Ratio – relative change in silanol (Si-OH) distribution
As with the SP-MAS calculated parameters one can utilize these parameters to determine changes in silicon chemistry resulting from coolant exposure and service.
Table I
Summary of 29Si NMR Chemical Shift Regions
Chemical Shift
Region (ppm) Silicon Species
+10 to +4 Polymer termination sites (SiO(CH3)3) M
-5 to –15 Polymer Termination Sites (SiO(CH3)2OH) MOH
-10 to -20 Motionally restricted silicone polymer. Cross-linked and H-bonded –(O-Si(CH3)2-O-)n D units within five monomer units of polymer termination
-21 D Units – motionally unrestricted silicone –(O-Si(CH3)2-O-)n
-75 to -85 Q1 Si(OSi)(OH)3 Silicate Center (M(OH)3)
-85 to -94 Q2 Si(OSi)2(OH)2 Silicate Center (D(OH)2)
-94 to -104 Q3 Si(OSi)3(OH) Silicate Center (TOH)
-104 to -120 Q4 Si(OSi)4 Silicate Center (Q)
Discussion
In use one observes that the gasket silicon chemistry changes dependent on additive chemistry and temperature/pressure conditions. When the polymers degrade one observes a general loss of D type signal intensity in the 29Si SP/MAS experiment as well as a corresponding increase in silicate content. One does not typically see changes in Q4 type but instead large changes in Q3 and Q2 content. These changes occur regardless of the presence of silicate in the coolant. This leads one to deduce that the Q3 and Q2 types are being generated by degradation of the polymer itself rather than a change in the chemistry of the silicate that was present in the sample initially. The author is not privy to additives and experimental conditions so he cannot speculate on the effect of silicate and other additives on the speed of the degradation that occurs. At the same time that Q3 and Q2 types are increasing in intensity the CP/MAS experiment clearly shows that there is a large increase in the relative amount MOH types and D types close to terminations (-5 to –20 ppm region). This proves that the exposure to coolants causes a hydrolysis of the Si-O-Si bond. However, it should also be notes that for the Q3 and Q2 types to appear one must also be hydrolyzing the Si-CH3 bonds.
The complimentary nature of the SP/MAS and CP/MAS experiments along with the use of only on set of experimental CP/MAS conditions means that relative changes in the various silicon chemistries can be analyzed to quantify the degree of degradation that a polymer has gone through.
Excellent Silicone Chemistry Link – Silicones in Pharmacutical Applications
For more information on this topic please contact:
John Edwards
Manager, Process and Analytical NMR Services
Process NMR Associates LLC,
87A Sand Pit Rd
Danbury, CT 06810, USA
Tel: (203) 744-5905
February 16th, 2006
February 15th, 2006
February 15th, 2006
NMR Petrophysics offers NMR logging courses and provide NMR log analysis services.
A paper on the effect of sorbed oil on 1H NMR response was published byStanford University researchers.
A book is available on the subject entitled, “NMR Logging – Principles and Applications”
“Oil-Viscosity Predictions From Low-Field NMR Measurements” by J. Bryan and A. Kantzas, U. of Calgary/Tomographic Imaging and Porous Media Laboratory, and C. Bellehumeur, U. of Calgary
February 15th, 2006
February 15th, 2006
February 15th, 2006
Also available at this site are a very handy palm utility that lists frequencies, gyromagnetic ratios, natural abundances, receptivities, magnetic and quadrupolar moments, and reference compounds of most NMR active nuclei – download PalmNMR. He also provides a nicely designed interactive NMR frequency map.
February 15th, 2006
February 15th, 2006
February 13th, 2006
February 9th, 2006
An excellent NMR users group exists (AMMRL-Association of Managers in Magnetic Resonance Laboratories) which consists of NMR facility managers and industrial NMR users. The group has an archive of questions posed and answers given to many issues that arise from the operation of Varian, Bruker and JEOL spectrometers predominantly in a college setting. Issues with NMR operation such as safety and peripheral infrastructure, as well as scheduling of users, manipulation of data and servicing of equipment are all covered in the discussions. Both groups can be joined at the sites above.
There is a Bruker users group archive directory located at http://calmarc3.cchem.berkeley.edu/archives/bum/. Membership of the Bruker users group can be obtaied by contacting he following e-mail (‘bruker-users-mail-request@purcell.cchem.berkeley.edu’). Membership to the Bruker brotherhood is carefully guarded and you will only be admitted if you operate Bruker equipment.
February 9th, 2006
The FTP link to download the software is: ftp://davinci.chem.umanitoba.ca/pub/marat/SpinWorks/.
The current version is 2.5.3. There is also an excellent documentation PDF file to help users work through the program functionality.
This is how Dr Marat describes his software on his home page:
“What is SpinWorks
SpinWorks has two functions: The first is to provide easy basic off-line processing of 1D NMR and 2D data on personal computers. SpinWorks other function is the simulation and iterative analysis of complex second order spectra including dynamic NMR problems and certain solid-state NMR problems, in a manner similar to our UNIX Xsim program. SpinWorks 2.4 is the forth release of SpinWorks version to contain 2D processing. Full support is included for Bruker (XwinNMR/UXNMR) and Varian (Unix VNMR) data formats. Included F1 detection modes include States, TPPI, States-TPPI, Single Detection (QF), and echo-antiecho. There have also been some improvements and bug fixes in the 1D and simulation routines, and these should be at least as stable as those in version 1.3. While the program is to the point where it should (I hope) be useful, there will, no doubt, be bugs and there are things that don’t yet work. The aim of the program is to make a program easy enough for undergrads to process magnitude COSY spectra (for example) with a single mouse click, and yet still be flexible enough for research use. SpinWorks currently handles only one data set at a time. However, most new computers have sufficient memory to run two or three copies of SpinWorks simultaneously. This can be very useful when examining the rows and columns of a 2D data set.
Computer Requirements
SpinWorks requires a 486 or higher processor (Pentium recommended) running Windows 95, 98, NT 4.0, Windows 2000 Pro, or XP (NT 4.0, XP or Win 2000 recommended). Windows ME is probably O.K., but is untested. Installation currently requires about 5 Mbytes of disk space exclusive of NMR data. 32 Mbytes or more of RAM are recommended, depending on NMR data set and simulation sizes. SVGA 800 x 600 or better display required (1024×768 or better recommended). For 2D processing a Pentium class processor with 64 Mbytes of memory is the practical minimum. For 2D you should also have your display set to at least 16 bit colour, otherwise the image and contour level colours will be strange. I have received reports (but have not confirmed) that SpinWorks will run under Linux with the WINE package and on a Mac with SoftWindows. A three-button mouse is ideal, but SpinWorks will work just fine with a two-button mouse. Note that on “Wheel Mice” the mouse wheel also serves as the middle mouse button. The mouse wheel can also be used for vertical scaling of 1D spectra.”
February 8th, 2006
“Application of 31P-NMR spectroscopy in food analysis. I. Quantitative determination of mono- and diglycerides in virgin olive oils”. A. Spyros, Photis Dais, J. Agric. Food Chem., 2000, 48, 802 . (pdf)
“Quantitative determination of the distribution of free hydroxylic and carboxylic groups in unsaturated polyester and alkyd resins by 31P NMR spectroscopy”.A. Spyros, J. Appl. Polym. Sci., 2002, 83, 1635. (pdf)
“Kinetics of diglyceride formation and isomerization in virgin olive oils by employing 31P NMR spectroscopy. Formulation of a quantitative measure to assess olive oil storage history”. A. Spyros, A. Fillipidis and P. Dais, J. Agric. Food Chem., 2004, 52, 157. (pdf)
This approach has also been applied to other edible oils so that their presence as adulterants can be observed and quantified:
“Classification of edible oils by employing 31P and 1H NMR Spectroscopy in combination with multivariate statistical analysis. A proposal for the detection of seed oil adulteration in virgin olive oils “. G. Vigli, A. Fillipidis, A. Spyros and P. Dais, J. Agric. Food Chem., 2003, 51, 5715. (pdf)
“Detection of extra virgin olive oil adulteration with lampante olive oil and refined olive oil using NMR spectroscopy and multivariate statistical analysis”. G. Fragaki, A. Spyros, G. Siragakis, E. Salivaras, P. Dais, J. Agric. Food. Chem., 2005, 53, 2810.(pdf)
Please contact Process NMR Associates with your potential 31P analysis.
February 8th, 2006
Nuclear magnetic resonance (NMR) has come a long way since it was discovered in the 1940s. This physical phenomenon, which arises from the intrinsic spin possessed by many nuclei, has provided a better understanding of the physics of nuclei and molecules. It has also been exploited to analyse the properties of many different materials in chemistry, physics, polymer science and biomedicine.
Recent developments in the use of high magnetic fields and pulsed NMR techniques have made it possible to probe the structure of organic compounds as complex as proteins. Imaging machines based on the NMR principle have also been developed, and now provide a powerful and non-invasive tool for diagnosing a variety of medical conditions. However, less well known are the applications of NMR for analysing food and drink. At the Joint Research Centre at Ispra, we are using a technique to detect whether a wine has been adulterated with foreign substances. This method is based on an NMR measurement of the deuterium content of wine.
Nuclear magnetic resonance is observed for nuclei with non-zero nuclear spin, which includes both the hydrogen nucleus (a proton) and the deuterium nucleus (a proton and a neutron). However, the physical properties of these two isotopes dictate that the NMR signal produced by deuterium nuclei is over 100 times weaker than that produced by the same number of hydrogen nuclei. The natural abundance of deuterium is also extremely low, with typical samples of hydrogen containing only about 0.015% of deuterium. This means that the NMR signal due to deuterium in a natural sample containing hydrogen is about a million times weaker than the signal due to hydrogen.
Despite this drawback, deuterium has very interesting properties for quantitative NMR. Deuterium has a quadrupole magnetic moment rather than a dipole moment, which means that it is unaffected by the nuclear Overhauser effect. This effect – in which radiofrequency radiation applied to the nucleus changes the strength of the resonance – is often exploited to enhance the NMR signal, but it also degrades the precision of quantitative techniques. Indeed, deuterium spectra generally show distinct peaks that are suitable for quantitative purposes.
An important advantage of NMR is that the deuterium content can be determined for each of the sites in a hydrogen-containing molecule that are not magnetically equivalent. For ethanol, for example, it is possible to determine separately the deuterium content of the methyl group (CH2D) and the methylene alcohol group (CHD) in the deuterium NMR spectrum. The low natural abundance of deuterium means that it is only necessary to consider molecules containing a single deuterium atom.
How does the deuterium content of wine indicate whether it has been adulterated? This is possible because the deuterium content of water in the hydrosphere and biosphere is not a constant. As an extreme example, ice at the South Pole has very low deuterium content, with a deuterium-to-hydrogen ratio of about 90 parts per million (ppm), while ocean water has a value of about 156 ppm. This natural variation is due to thermodynamic and kinetic effects that take place during the water cycle, when water evaporates from the ocean and precipitates over land. The transpiration of water from plants also favours lighter isotopes, leading to a greater abundance of deuterium in the water contained in plants.
The deuterium content of the water in any plant, including the vines used in wine production, therefore depends on several factors that can be related to the geoclimatic conditions during plant growth. Moreover, the water in the plant is used in the photosynthesis of different chemicals, in particular the production of glucose. This transfers the isotopic content of the water to the glucose and other sugars present in the plant, which means that both the metabolism and physiology of the plant influence the final deuterium content of the sugars. The deuterium content of the sugars therefore provides a good indication of their botanical origin.
Although sugars are particularly difficult to study with deuterium NMR, it is possible to detect the deuterium content of the methyl group in ethanol, which is produced during the yeast fermentation of wine. Ethanol is responsible for most of the alcoholic content of wine, and it retains a deuterium-to-hydrogen ratio representative of the sugars from which it is produced. Quantitative NMR can therefore be used to determine whether the ethanol present in wine originates from the sugars naturally present in the grapes or whether other sugars have been added to boost the alcoholic content. This practice – known in the trade as “chaptalization” – is allowed in the European Union, but only within specified limits.
A simple way of using NMR to detect sugar in wine is to compare the deuterium content of the wine being tested with a genuine wine from the same geographical origin. This requires an accurate determination of the NMR signal from the genuine wine, which is being done for all European wine-producing countries by our laboratory and other official laboratories of the European Union. The NMR data of more than 10 000 samples, together with an exhaustive description of the wines, have been collated since 1991 and now provide a powerful tool against fraudulent practice.
Other isotopic indicators, such as the content of oxygen-18 in wine or carbon-13 in ethanol, can be used to help detect other types of fraud, such as watering down the wine or false declarations of geographic origin. These parameters are usually measured by mass spectrometry, but this does not provide the site-specific information given by deuterium NMR.
Isotopic techniques, particularly the NMR analysis of deuterium, can also be used to control the authenticity of fruit juices by first converting the sugars into ethanol using controlled fermentation. Deuterium NMR can also be used to characterize the origin of natural flavours such as vanillin or raspberry. In future the combination of nuclear magnetic resonance and mass spectrometry will almost certainly lead to many other applications in detecting frauds in food.
About the author
Claude Guillou and Fabiano Reniero are at the Joint Research Centre of the European Commission, Ispra, Italy.
February 8th, 2006
February 8th, 2006
February 8th, 2006
February 8th, 2006
February 8th, 2006
Wines and juices: Since 1991, the European data bank on wines has been established years after years and contains now the isotopic data of several thousands of wines from the main producing countries in Europe. Illegal enrichment of wines can be checked out and, according to the pertinence of the data bank, geographic origins of QWPSR wines can be controlled. Private ventures took also an interest in building up specific databanks of wines from third countries. The market of fruit juices has been stabilized by SNIF-NMR and the quantity of sucrose added in pure juices has been severely reduced. A joint approach using SNIF-NMR and IRMS is very useful for fighting against other sophisticated frauds.
Aromas and perfumes: The replacement of vanillin from beans (Vanilla Planifolia) by synthetic vanillin is an old practice and during thirty years, isotopic methods (IRMS and SNIF-NMR) were a nightmare to the fraudsters. Biotechnology forms the subject of the last serial of the vanillin saga: vanillin obtained from ferrulic acid by fermentation has been declared “natural” providing that all the steps and ingredients taking part in its manufacture are “natural”. The potentiality of isotopic analysis for solving the problem of the natural status of biotechnological vanillin will be discussed. Progresses in the authentication of aromatic molecules obtained from the shikimate pathway and of monoterpenes bio synthesized according to the deoxyxylulose pathway are also pointed out.
Miscellaneous applications of SNIF-NMR: During the last decade, fats and oils, fishes, dairy products and coffees received a great attention form the official and private laboratories in charge of the consumer protection. Legal (tobacco) and illegal (heroin) drugs have also been authenticated by SNIF-NMR.”
See also – Eurofins Site, and the following papers in The Chemical Educator (Elsevier), and this US Customs Service Report, explain the technique and a simple application very well.
SNIF NMR methodology has actually been patented US Patent 6,815,213, US Patent 4,550,082.
See Process NMR Associates for your NMR analysis needs.
February 8th, 2006
See Process NMR Associates for your 13c analysis needs.
February 7th, 2006
Essential Oils
Ajowan EO Trachyspermum copticum – India (seed)
Allspice Berry EO Pimenta officinalis
Amyris EO Amyris Balsamifera – Jamaica
Angelica Root EO Angelica archangelica
Angelica Seed EO Angelica archangelica
Anise Seed EO Pimpinella anisum
Armoise EO Artemesia herba alba – Morocco
Balsam Peru EO Myroxylon balsamum
Balsam Tolu EO Myroxylon balsamum – El Salvador
Basil EO Ocimum basilicum
Bay Leaf EO Pimenta racemosa
Bay Laurel EO Laurus nobilus – Jamaica
Benzoin Liquid Resin Benzion Styrax – China
Bergamot EO Citrus bergamia
Birch Sweet EO Betula lenta
Black Pepper EO Piper nigrum – India
Blood Orange EO Citrus sinensis var.
Bog Myrtle EO Myrica gale – Europe
Cabrueva EO Myocarpus fastigiatus – South America
Cade EO Juniperus oxycedrus – Spain
Cajeput EO Melaleuca cajeputi
Calamus EO Acorus calamus
Camphor EO Cinnamomum camphora
Cananga EO Cananga odorata
Caraway Seed EO Carum carvi
Cardamom Seed EO Elattaria cardamomum
Cassia EO Cinnamomum Cassia – China
Catnip EO Nepeta cataria
Carrot Seed EO Daucus carota
Cedarwood EO Cedrus atlantica
Cedarwood Atlas EO Cedrus atlantica – Morocco
Cedarwood Chinese EO – Cupressus funebris – China
Cedarwood Himalayan EO Cedrus deodara – Himalaya
Cedarwood Mexicana EO Juniperus mexicana – Mexico (also Texas Cedarwood)
Cedarwood Virginian EO Juniperus Virginiana – USA
Cedar Leaf EO Thuja occidentalis – USA
Celery Seed EO Apium graveolens
Chamomile German EO Matricaria chamomilla
Chamomile Egypt EO Matricaria chamomilla
Chamomile Spain EO Matricaria chamomilla
Chamomile Roman EO Anthemis nobilis
Cinnamon Bark EO Cinnamomum
Cinnamon Leaf EO Cinnamomum zeylanicum
Citronella EO Cymbopogon nardus
Citronella Sri Lanka EO Cymbopogon nardus
Citronella Java EO Cymbopogon winterianus
Clary Sage EO Salvia sclarea
Clove Bud EO Eugenia caryophyllata
Clove Leaf EO Eugenia caryophyllata – Madagascar
Copaiba Balsam EO Copaifera officinalis
Coriander Seed EO Coriandrum
Cumin EO Cumimum cymimum
Cypress EO Cypressus sempervirens
Cypriol EO Cyperus scariosus – Brazil (Flowers)
Davana EO Aretemesia pallens
Dill Seed EO Anethum sowa – India
Dill Weed EO Anethum graveolens
Dragons Blood EO Croton lechleri – South America (Resin)
Dwarf Pine EO Pinus mugo
Elemi EO Canarium luzonicum
Eucalyptus Citriodora EO Eucalyptus citriodora
Eucalyptus Globulus EO Eucalyptus globulus
Eucalyptus Radiata EO Eucalyptus radiata
Eucalyptus Spain EO Eucalyptus globulus
Eucalyptus China EO Eucalyptus globulus
Eucalyptus Smithii EO Eucalyptus smithii – China (leaf)
Fennel Sweet EO Foeniculum vulgare
Fennel Hungary EO Foeniculum vulgare
Fennel Spain EO Foeniculum vulgare
Fennel Rectified EO Foeniculum vulgare
Fennel Sweet EO Foeniculum vulgare
Fir Needle EO Abies alba
Fir Siberian EO Abies sibirica – Austria (Needle)
Fir Canadian EO Abies balsamea – USA (Needle)
Frankincense EO Boswellia carteri
Galbanum EO Ferula galbaniflua – Turkey (Gum)
Garlic EO Allium sativum – Mexico (Bulb)
Geranium EO Pelargonium graveolens
Geranium Rose EO Pelargonium roseum – France
Ginger EO Zingiber officinale
Ginger Grass EO Cymbopogon martini – China
Grapefruit Pink EO Citrus paradise
Guaiacwood EO Bulnesia sarmienti – Paraguay
Helichrysum EO Helichrysum angustifolium
Helichrysum Italicum EO Helichrysum italicum
Hop EO Humulus lupulus
Hyssop EO Hyssopus officinalis
Juniper Berry EO Juniperus communis
Labdanum EO Cistus labdanum
Lantane EO Lantara camara – Madagascar
Lavandin EO Lavendula latifolia
Lavender EO Lavendula angustifolia
Lemon EO Citrus limon
Lemongrass EO Cymbopogon citratus
Lemon Myrtle EO Backhousia citriodora – Australia
Lime EO Citrus aurantium
Lime (Distilled) EO Citrus aurantifolia
Lime (Cold Pressed) EO Citrus aurantifolia
Litsea Cubeba EO Litsea cubeba – China
Mace EO Myristica fragrans – Spain (Husk)
Mandarin EO Citrus reticulata
Marjoram EO Origanum majorana
Melissa EO (Lemon Balm) Melissa officinalis
Mint Brazil EO Mentha arvensis
Mint China EO Mentha arvensis
Mint Japan EO Mentha arvensis
Mugwort EO Artemisia vulgaris
Mullein EO Verbascum thapsus – India (Leaf)
Myrrh EO Commiphora myrrha
Myrtle EO Myrtus communis
Neroli EO Citrus Aurantium – Egypt
Niaouli (Cineole) EO Melaleuca viridiflora
Niaouli (Nerolidol) EO Melaleuca quinquinervia
Nutmeg EO Myristica fragrans
Oat EO Avena sativa
Opoponax EO Commiphora guidotti – Ethiopia
Orange Bitter EO Citrus aurantium
Orange Sweet EO Citrus sinensis
Oregano EO Thymus capitatus
Palmarosa EO Cymbopogon martini
Parsley Seed EO Petroselinum sativum
Patchouli EO Pogostemon cablin
Pennyroyal EO Mentha pulegium
Pepper Black EO Piper nigrum
Peppermint EO Mentha piperita
Petitgrain EO Citrus aurantium
Pine Needle EO Abies sibirica
Pine Dwarf EO Pinus mugo – Austria (Needle)
Pine Scots EO Pinus sylvestris – Hungary (Needle Twig)
Pine EO Pinus pinaster – USA (Needle)
Ravensara EO Ravensara aromatica
Rosalina EO Melaleuca ericifolia – Australia
Rose EO Rosa centifolia
Rosemary EO Rosmarinus officinalis
Rosewood EO Aniba roseaodora
Sage EO Salvia officinalis
Sandalwood EO ( Mysore ) Santalum album
Spearmint EO Mentha spicata
Spike Lavender EO Lavandula latifolia
Spikenard EO Nardostachys jatamansi
Spruce EO Tsuga canadensis
Spruce Black EO Picea mariana – Norway (Needle)
Star Anise EO Illicium verum
Tagetes EO Tagetes minuta
Tangerine EO Citrus reticulata
Tarragon EO Dracunculus spp.
Tea Tree EO Melaleuca alternifolia
Thuja EO Thuja occidentalis
Thyme Red EO Thymus vulgaris
Thyme Sweet EO Thymus vulgaris – France
Thyme White EO Thymus vulgaris – Spain
Turmeric EO Curcuma longa – India
Valerian Root EO Val ariana officinalis
Verbena EO Lippia citriodora
Vetiver EO Vetiveria zizanoides
Wintergreen EO Gaultheria procumben
Wormwood EO Artemisia absinthium
Yarrow EO Achillea Millefolium – Bulgaria
Ylang-Ylang Extra EO Canaga odorata
Ylang-Ylang I EO Canaga odorata
Ylang-Ylang III EO Canaga odorata
Carrier oils
Apricot Kernel Oil Prunus armeniaca
Aloe Vera Oil Aloe barbadensis -USA
Avocado Oil Persea americana
Borage Oil Borago officinalis
Camelina Oil Camelina sativa
Camellia Oil Camellia sinesis – Japan (Seed)
Canola Oil Brassica napus – Canada
Castor Oil Ricinus communis – India (Seed)
Coconut Oil (Fractionated) Cocos nucifera
Coconut Oil (Virgin) Cocos nucifera
Corn Oil
Cottonseed Oil Gossypium seminis – USA (Seed)
Emu Oil
Evening Primrose Oil Oenothers biennis
Flax Seed (Linseed) Oil Linum usitatissimum – USA
Foraha (Tamanu) Calophyllum Inophyllum
Grapeseed Oil Vitis vinifera
Hazelnut Oil Corylus avellana
Hemp Seed Oil Cannabis Sativa
Jojoba Golden Simmondsia chinensis
Kukui Oil Aleurites moluccans
Macadamia Nut Oil Macadamia integrifolia – Australia
Olive Oil Olea eurpaea – Italy
Palm Oil Passiflora elacsis – USA
Palm Kernel Oil Passiflora aincarnata – Malaysia
Peanut Oil Arachis hypogeae – USA
Pecan Oil Algooquian paccan – USA
Pistachio Nut Oil Pistacia vera – USA
Rose Hip Seed Oil Rosa mosqueta
Safflower Oil Carthamus tinctorius – Guatamala
Sesame Oil Sesamum indicum
Soya Bean Oil Soja hispida – USA
Sunflower Oil (High Oleic) Helianthus annuus
Sweet Almond Oil Prunus dulcis
Walnut Oil Juglans ragia – USA
Wheatgerm Oil Triticum vulgare
Almond Fragrance Oil
Bitter Almond Fragrance Oil
Coconut Fragrance Oil
Rosemary Oil Extract
NMR Reference: Ref: “Essential Oils Analysis by Capillary Gas Chromatography and Carbon-13 NMR Spectroscopy ”
by K.H. Kubeczka and V. Formacek, 2nd Ed, Wiley, NY (2002)
Essential Oil Chemistry Reference: Journal of Essential Oil Research
See Process NMR Associates Essential Oils Page
January 25th, 2006
January 25th, 2006
EUROMAR – York will be held July 16-21, 2006 at The University of York Main Campus, Programme
22nd International Conferences on Magnetic Resonance in Biological Systems will be held August 20-25, 2006 in Goettingen, Germany – programme
6th Colloquium on Mobile NMR will be held 6-8 September 2006 in Aachen, Germany – Program
SMASH 2006 will be held September 10-13 at the Sheraton Hotel in Burlington, Vermont – Program
The NMR Symposium of the 48th Rocky Mountain Conference on Analytical Chemistry will be held July 23 – 27, 2006. The conference site is the Beaver Run Resort & Conference Center in Breckenridge, Colorado.
21st Meeting of the Central European NMR Discussion Groups will be held April 23-26, 2006, Valtice, Czech Republic in the hotel HUBERTUS in Valtice Castle
14th ISMRM will be held 6-12 May 2006 in Seattle Washington – program
ANZMAG 2006 will be held February 12-16 at the Murramarang National Park, NSW, Australia – Programme
January 25th, 2006
January 25th, 2006
January 2nd, 2006
Open RF Components of NMR Spectrometer
Open Magnet Enclosure – Fully Shielded NdFe Permanent Magnet at 1.4 Tesla
Posted in Process NMR | Edit | No Comments »
December 28th, 2005
December 28th, 2005
Process NMR Associates has developed the NMR methodologies prescribed by IASC and can quantify Acemannan, glucose and Malic Acid in the presence of a Nicotinic Acid Amide Standard. Breakdown products such as acetic acid, lactic acid, pyruvic acid, succinic acid can be readily quantified as can the presence of additives such as citric and benzoic acids. Adulterants such as maltodextrin can be readily quantified and the presence of n0n-aloe vera products can also be determined.
Contact John Edwards for details.
December 28th, 2005
December 28th, 2005
December 25th, 2005
December 22nd, 2005
About the lecture: Soon after the end of World War II, peaceful uses of atomic energy became a major thrust of scientific endeavor around the world. At present, the world derives 16 percent of its electricity from nuclear power, mainly in industrialized countries. The level is 20 percent in the United States and 75 percent in France. Concerns about safety in the nuclear power industry have been a source of continuing controversy for many years, and the single most important challenge in this area is what to do with nuclear waste. The spent nuclear fuel from a reactor is highly radioactive and will remain so for an extremely long time. The potential for release of radioactive material into the environment is strongly coupled to the chemical properties of the waste material, so many of the problems and many of the potential solutions are chemical in nature. This talk will present issues in current national policy and will discuss the interplay between science and policy, using several National Research Council studies to illustrate the complexity of the problem. How is scientific input obtained? How is it utilized? Does it receive the respect that it deserves? And what can you do to improve the situation?
About the speaker: Dr. Raber is a science policy consultant with GreenPoint Science, which he formed in 2004. Previously, he served for thirteen years as Director and then Senior Scholar of the Board on Chemical Sciences and Technology at the National Academy of Sciences and its operating arm, the National Research Council (NRC). Before joining the NRC in 1989, he was a member of the faculty of the University of South Florida from 1970 to 1990, publishing some 70 research articles. Dr. Raber is active in ACS governance, serving recently on the C&EN Advisory Board, the Committee on Chemistry and Public Affairs, and the Committee on Science (which he previously chaired). He recently completed several terms as the Secretary of the U.S. National Committee for IUPAC and currently serves as Chair of the Chemical Technology Operating Council of the AIChE. Dr. Raber’s responsibilities at the NRC centered on organizing and directing science and science policy studies, particularly in the areas of federal policy and its interrelationships with the chemical sciences. These efforts resulted in more than 50 reports and monographs that provide technical policy guidance on topics that encompass R&D opportunities, laboratory safety and management, nuclear waste disposal, and the threat of terrorism.
Directions: From Rte. 17M West in Middletown turn left onto Fulton Street. Turn left onto Wawayanda Ave. Turn left onto Grandview Ave. Enter parking lot on right. For complete directions and campus map, visit http://www.sunyorange.edu/aboutus/directions/index.shtml.
Meeting #2
“Nanoscale Building Blocks for Mesoscopic Materials” Dr. Tom Mallouk, Pennsylvania State University, Monday, March 20, 2006, at IBM* Refreshments: 6:15 PM, Lecture: 7:00 PM
*Registration for this talk is required. Contact Charles Davis (IBM) at 845-892-9570 or by e-mail at cdavis@us.ibm.com by March 13. Photo ID must be presented at the site. Room information and directions will be provided to all registered attendees.
About the speaker: Dr. Mallouk is the DuPont Professor of Materials Chemistry and Physics and the Director of the Center for Nanoscale Science at Penn State. His research focuses on the assembly of nanoscale materials and their applications to interesting problems in chemistry, including photocatalysis, molecular electronics, environmental remediation, fuel cell electrochemistry, chemical sensing, and catalytically driven movement.
Meeting #3
“Mechanism of Oxidation of DNA by Pt(IV) Complexes” Dr. Sunhee Choi, Department of Chemistry and Biochemistry, Middlebury College
Friday, March 31 2006, Vassar College, Refreshments:6:15 PM, Lecture:7:00 PM Mudd Chemistry Building (Room TBA)*
*Room to be announced on the Mid-Hudson ACS listserv and at www.midhudsonacs.org.
Contact Joe Tanski (Vassar) at 845-437-7503 or by e-mail at jotanski@vassar.edu.
About the lecture: Platinum complexes are biologically important for their anticancer activities. The interaction of DNA with PtII complexes has been extensively studied by many research groups. PtIV complexes are kinetically inert and their reaction with DNA was not generally expected. However, Dr. Choi’s research has shown that PtIV complexes with highly electron-withdrawing and bulky ligands have high reduction potentials and high reactivity toward 5’-GMP. Furthermore, a PtIV complex, trans-Pt(d,l)(1,2-(NH2)2C6H10)Cl4, [PtIVCl4(dach)], which has a high reduction potential, oxidizes 5’-dGMP, 3’-dGMP and 5’-d[GTTTT]-3’. Kinetic studies and the proposed mechanism will be discussed.
About the speaker: Dr. Sunhee Choi is Professor of Chemistry and Biochemistry at Middlebury College in Vermont. Dr. Choi received a B.A. degree from Seoul National University in 1973 and went on to receive a master’s degree in Physical Chemistry at the Korean Advanced Institute of Science in 1975. She earned her Ph.D. in Physical Chemistry at Princeton University in 1982 in the laboratory of Professor Thomas G. Spiro. After her Ph.D. she became an industrial chemist at Colgate-Palmolive where she was awarded the Colgate Presidential Award for Technical Excellence and obtained a U.S. Patent for cold water detergency. In the fall of 1987, she joined the faculty at Middlebury. Dr. Choi is active in research in metals in biological system with many of her undergraduate colleagues. Her research has been funded from a variety of sources such as the National Institutes of Health, National Science Foundation, Petroleum Research Fund, Research Corporation, and Vermont-EPSCOR.
Directions: Vassar College is located off Raymond Avenue in Poughkeepsie, NY. Refer to the following link for driving directions and campus map: http://www.vassar.edu/directions/. Enter the Main Entrance of the campus on Raymond Avenue and The Main Building and College Center are in front of the Main Entrance. The Security Guard at the Main Entrance will direct you to parking. The Villard Room is on the second floor of the Main Building/College Center. The Alumnae House is located across the street from the tennis courts on Raymond Ave at Vassar.
December 22nd, 2005
December 1st, 2005
We perform these studies on a dedicated Varian UnityPlus-200 spectrometer to yield spectral and relaxation data to allow the determination of drug-excipient interactions, as well as simple polymorph differentiation and amorphous material content. Both 13C SP-MAS and CP-MAS experiments are utilized in these studies along with T1 and cross-relaxation time determinations.
See Process NMR Associates for your Polymorphism Analysis
November 16th, 2005
November 14th, 2005
November 9th, 2005
The NMR group of the Northern Jersey ACS section will be hosting a talk on Cryoprobe Technology combined with Principal Component Analysis.
The details of the talk are:
Wednesday, November 16, 2005 – The NJACS Proudly Presents:
“New Directions of CryoProbe Technology”
by Kimberly L. Colson, Ph.D. Bruker BioSpin Corp.
Abstract:
The utilization of new NMR technologies, such as CryoProbe technology, has revolutionized the applicability of NMR to many areas of study through a significant gain in sensitivity. In addition, advances in automation and the implementation of statistical approaches to examining variations amongst large datasets have enabled NMR to be used as a tool for classification of samples, and hence for examination of quality control, adulteration, quantification, biomarker discovery, etc.
CryoProbe technology enhances 1H, 13C, 15N, 19F, and 31P NMR sensitivity by a factor of four. This allows components in small quantities to be detected and allows NMR spectra to be acquired 16 times faster than previous methods. Although widely accepted for protein and small molecule structure analysis CryoProbe technology is not yet fully utilized in more challenging applications such as quality control, sample quantification, metabonomics and biomarker discovery. One reason is that the NMR data obtained on large datasets and on complex mixtures produces data that are often difficult to evaluate.
Simple comparison or quantification between large data sets is tedious and often impractical. However, combining the use of new CryoProbe Technology with the pattern recognition and multivariate statistical methods, like principle component analysis (PCA), allows rapid comparison of these large complex data sets. Principle component analysis algorithms can classify an object based on identification of inherent patterns in a set of experimental measurements or descriptors and facilitates the visualization of inherent patterns. Data set comparisons is therefore easier.
This powerful combination of CryoProbe technology, Statistical Analysis methods and new NMR experiments can be employed in many areas including the analysis of pharmaceuticals, natural products, metabolites, synthetic materials, foods, flavors, fragrances, and metabolites, to rapidly assess the composition of substances for quality control, mixing levels, product verification, and product identification. In this lecture we will explain the components that make up this new approach and demonstrate its utility with some examples.
Location: Woodbridge Hilton. Dinner at 6:30 p.m. Seminar at 7:00 p.m.
Buffet dinner: $10 for students and post-docs, $30 for all others, No charge for the seminary only. Beverages provided In the Bar at 5:45 p.m.
November 9th, 2005
November 4th, 2005
Initially Process NMR Associates (PNA) concentrated on supporting the Invensys MRA product which had been formed by a JV between Invensys and the Elbit ATI NMR company. From 1997-2003 PNA was the application development and technical marketing consultants to that product. In 2003 PNA made a strategic decision to leave the relationship with Invensys and has concentrated on developing it’s analytical NMR service for industry. Currently PNA serves over 100 small and large companies for their liquid and solid-state NMR needs.
In October 2005 PNA entered into a JV arrangement with TTC Labs Inc (Fond du Lac WI). This JV is NMR Process Systems Inc and it will be involved in marketing, installing, servicing and enabling process NMR controlled APC and optimization projects.
November 4th, 2005
Gasification can take many input feeds such as municipal waste, sewage, coal, plastics, bitumen, heavy oil, waste oils, biomass, etc. These are gasified to SynGas (H2/CO) which initially contains many impurities (metals, sulfur, oxides, chlorine etc) some impurities for a refractory (glass) that is removed from the gasifier and this refractory can be readily disposed as it encapsulates a lot of the “nasties”. The gaseous component of the product can be treated to yield pure syngas which can then be passed over Fischer Tropsch (FT) catalyst. The FT process is a gas-to-liquids process that recombines the elements present in the gas into hydrocarbons. The produced hydrocarbons can then be tailor made for the application (fuels, lubes, monomers) by cracking and/or hydroisomerization. FT is also a valuable technology as the large oil companies see it as a technology to develop their stranded gas deposits into a more readily transportable material so that these assets can be monetized.
From waste we will derive the energy required for the future. Shell, Exxon, British Petroleum, Syntroleum, and Sasol-Chevron are just a few of the companies working on GTL technology. Rentech Inc are another company working in collaboration with Texaco and Sasol (now Sasol-Chevron). Here is their statement regarding FT….GTLSite.pdf
13C NMR is the perfect way to monitor the detailed molecular chemistry of the products made by GTL processes. On-line 1H NMR or at line 13C would allow chemistry to be controlled on a timescale of minutes.
The information out there is vast from organizations such as Alaska Natural Gas Transportation and their ideas for the BP project at Nikiski. Modular designs of various process components will lead to small plants and improved product quality.
An excellent summary of the technology is found at Chemlink, Exxon, Sasol, DOE, Eltron Research, Foster Wheeler, SRI Consulting, Statoil, G-T-L, and Thailand.
GTL technology development will have fall out effects in the natural gas market – an excellent economics artive of LNG and GTL is found at EnergyPulse. A Congressional Report also investigates the GTL and natural gas markets. A great source of centralized energy news is EnergyBulletin.net which harvests many articles from around the world dealing with “peak oil” reporting. The Energy Blog is another excellent source of Energy Related Material.
The next big push will be to develop the oils shale, heavy oil and tar sand deposits that are found in Alberta, Utah, and the Orinoco Basin to name a few. These are the only deposits that can yield enough hydrocarbon for the GTL Technologies and meet energy needs for the foreseeable future. Strategically the development of these heavy resources to marketable fuels would remove the US dependence on imported oil.
November 4th, 2005
November 4th, 2005
About the lecture: Classic pearlescent pigments have evolved far beyond the biologically derived mother-of-pearl that originally inspired them. The class of synthetics that includes pearlescent pigments is now called “effect materials.” This renaming emphasizes that appearance is the sum of many sensory effects, not just color. The most robust effect materials are composed of thin layers of metal oxides coated onto inorganic substrates. The layer structure determines color effects, but the morphology of the substrate plays a significant role in the overall effect. There is also a class of effect materials composed of bismuth oxychloride, in which the morphology of the BiOCl crystal is solely responsible for the observed effects.
About the speaker: Dr. Johnson is originally from South West England, near Bath . He received a BS in Chemistry from the University of Birmingham, UK and his MS in Chemistry from the École Nationale Supérieure de Chimie de Montpellier , France . He earned a PhD in Inorganic Materials Chemistry with Professor Mark Weller at the University of Southampton, UK. Dr. Johnson’s postdoctoral experience includes work in zeolite chemistry with Professor John Parise at SUNY Stony Brook and chemical catalysis at Worcester Polytechnic Institute with Fabio Ribeiro. He joined Engelhard in 2001 as a Research Chemist at the Corporate R&D facility in Iselin , New Jersey . In June 2004, he joined Engelhard’s Appearance and Performance Technology facility in Ossining , New York as a Senior Scientist. Dr. Johnson is a member of the Royal Society of Chemistry, American Chemical Society, Materials Research Society, and International Zeolite Association.
Directions to Vassar College : Vassar College is located at 124 Raymond Avenue in Poughkeepsie , NY . Refer to the following link for driving directions and campus map: www.vassar.edu/directions/. Enter the main entrance of the campus on Raymond Avenue .
November 4th, 2005
November 4th, 2005
It would be interesting to take detailed liquid-state 1H and 13C analyses, with complimentary solid-state 13C CP- and SP-MAS relaxation data in order to map the correlation between TD-NMR FID and CPMG profiles and the detailed chemistry of the samples.
November 4th, 2005
We operate a Varian VXR300S for liquids analysis and a Varian UnityPlus-200 for solids and liquids analysis. Sitting in the adjacent space of our of our office I have 2 full VXR-300 consoles as board swap for my liquids system, a VXR-400, a Varian 300 MHz R2D2 magnet, two 60 MHz process NMR spectrometers, and two boxes full of acquisition control board, ADC boards, sum-to-memory boards, etc.
I question why any small company would buy a new spectrometer when you must pay through the nose and watch it depreciate at a terrific rate. Then you have to deal with the fact that you are held hostage by the spectrometer manufacturer as failed components are only available through them initially at high exchange rates, and they will not ship you a board unless you have taken their maintenance course.
If you buy 10 year old spectrometers, either third party, or from ebay and other auctions, you can support yourself for pennies on the dollar. People actually laugh when I say I support the spectrometer service aspects of my business by surfing ebay and the internet.
One great third party supplier is Triangle Analytical who install and service spectrometers and take the worry of Cryogen refills away with their Helium (and Nitrogen if you want it) fill contracts. The perception of NMR as an expensive instrument to buy or mainatain is simply not true any more.
If anyone has old NMR spectrometers, probes, magnets, or amplifiers laying around let me know…I can probably find a home for them.