2H/1H ratio analysis of flavor compounds by on-line gas chromatography–pyrolysis–isotope ratio mass spectrometry (HRGC–P–IRMS): citral

✍ Scribed by Katja Hör; Christiane Ruff; Bernhard Weckerle; Thorsten König; Peter Schreier

• Publisher: John Wiley and Sons
• Year: 2001
• Tongue: English
• Weight: 83 KB
• Volume: 16
• Category: Article
• ISSN: 0882-5734
• DOI: 10.1002/ffj.1008

✦ Synopsis

Abstract

Based on ^2^H/^1^H measurements of commercial synthetic and natural citral (neral and geranial), on‐line gas chromatography–pyrolysis–isotope ratio mass spectrometry (HRGC–P–IRMS) was used to determine the δ^2^H~SMOW~ values of citral in essential oils from Cymbopogon flexuosus and C. citratus, Litsea cubeba, Lippia citriodora, Melissa officinalis and the Citrus species C. aurantium, C. limon, C. sinensis, C. paradisi and C. aurantifolia. The technique allowed reliable differentiation of natural (δ^2^H~SMOW~ from −236 to −314‰) from synthetic products (δ^2^H~SMOW~ from +38 to −197‰), even when some samples can also have very negative δ^2^H values, e.g. −197‰, but permitted no distinction within the origins from the various plant species. Copyright © 2001 John Wiley & Sons, Ltd.