Adulteration of Senegal (Gum Arabic) Investigated by NMR Spectroscopy
1H and 13C NMR are ideal for the analysis of gum
arabic adulteration with lower grade materials. In the examples below we show
the contrasting spectra of acacia senegal compared to acaica seyal, acacia
polycantha and combretum.
Adulteration can be readily observed and quantified by analyzing relative
intensities of methyl resonances in the 13C spectrum.