Abstract
ABSTRACT Capillary gas chromatography coupled on-line with isotope ratio mass spectrometry (GC/IRMS) is used to determine the δ13CPDB-values of some typical peppermint oil constituents. By the method of the internal isotopic standard (i-IST), a characteristic isotopic fingerprint of authentic peppermint oil is established and used for the authenticity control of commercially available peppermint oils. Furthermore, enantioselective capillary gas chromatography in combination with IRMS (enantio-GC/IRMS) is used to prove the genuineness of peppermint oil.
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