Control of Oenological Products: Discrimination between Different Botanical Sources of L-tartaric Acid by Isotope Ratio Mass Spectrometry

Following previous studies on counterfeit of wines with synthetic ingredients, the possibility of frauds by natural external L-tartaric acid has also been investigated. The aim of this research was to map the stable isotope ratios of L-tartaric acid coming from botanical species containing large amounts of this compound: grape and tamarind. Samples of L-tartaric acid were extracted from the pulp of tamarind fruits originating from several countries and from grape must. d13C and d18O were measured for all samples. Additional d2H measurements were performed as a complementary analysis to help discrimination of the botanical origin. Different isotopic patterns were observed for the different botanical origins. The multivariate statistical analysis of the data shows clear discrimination among the different botanical and synthetic sources. This approach could be a complementary tool for the control of L-tartaric acid used in oenology.

MORENO ROJAS Jose';  COSOFRET Sorin;  RENIERO Fabiano;  GUILLOU Claude;  SERRA Francesca; 

2008-04-03

JOHN WILEY & SONS LTD

JRC44343

0951-4198,   

https://publications.jrc.ec.europa.eu/repository/handle/JRC44343,   

10.1002/rcm.3105,