The combined use of isotope ratio mass spectrometry and SNIF-NMR ( Site-Specific Natural Isotope Fractionation-Nuclear Magnetic Resonance ) allows to discover adulteration otherwise undetectable even allowing for the identification of the geographical origin of the essential oil.
22.
The SNIF-NMR method ( Site-Specific Natural Isotope Fractionation studied by Nuclear Magnetic Resonance ) is able to determine, to a high level of accuracy, the isotopic ratios for each of the sites of the molecule, which enables a better discrimination.
