“…An alternative method, which is of specific importance for the authentication of food products, is site‐specific natural isotopic fractionation (SNIF) NMR (Martin et al., ), which is now the official method for the analysis wine and vinegar in the European Commission (EC regulation 2676/90 2347/91, 2348/91), the International Wine Office, and an official AOAC method for the detection of sugar addition in fruit juices and the determination of the origin of vanillin (Bensaid, Wietzerbin, & Martin, ; Caytan et al., ; Remaud & Akoka, ). SNIF‐NMR is based on the detection of deuterium nuclei, and more specifically, on measuring the isotopic ratio for D/H or 13 C/ 12 C on each site of a molecule, and has been used for the authentication of several products, such as honey (Giraudon, Danzart, & Merle, ; Bertelli et al, ), fruits, vinegar (Ko, Cheng, Chen, & Hsieh, ), wine (Košir et al., ; Ogrinc, Kosir, Kocjancic, & Kidric, ), and spirits (Hsieh, Li, Cheng, & MA, ; Jiang et al., ; Lai, Hsieh, & KO, ; Perini, Giongo, Grisenti, Bontempo, & Camin, ).…”