The following Figure 9 summarizes the principle of interpretation of:
* Results measured by IRMS (isotopic deviation of δ C), which enables discrimination of plants according to their CO photosynthetic metabolism (C4 like can or maize versus C3 like beet, orange or grape)
* With results measured by SNIF-NMR ((D / H)I ) that can differentiate the botanical origin of sugars within the same metabolic group (beet versus orange or grape)
Values obtained on a test sample are then compared with the values of authentic samples (Database).