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The relationship of the concentrations of vanillin to those of the other components has been determined in order to obtain information about the range of variation in vanilla deriving from different origins. In general the relationship of vanillin to p-hydroxybenzaldehyde is taken. Vanillin and the other in vanilla capsules present compounds seems to have different oxidation behaviours. Isotopic analysis methods for the purpose of detecting adulteration of vanilla extracts is strictly limited to unmanipulated molecules. Using specific 2H or 13C labelled reagents, it is easy to synthesise compounds which emulate the natural isotopic content. In order to be definitive of the authenticity of vanilla extracts, a large number of samples (natural with different origin and synthetic) have to be investigated by GC/MS as well as by NMR regarding delta 13C values as well as deuterium distribution values.

Additional information

Authors: ANKLAM E, JRC Ispra (IT)
Bibliographic Reference: EUR 15561 EN (1993) 69 pp., FS, free of charge
Availability: Available from Joint Research Centre, Publication Department, I-21020 Ispra (Va.) (IT)
Record Number: 199511608 / Last updated on: 1995-12-12
Original language: en
Available languages: en