Authentication of Mustard Oils by Combined Stable Isotope Analysis (SNIF-NMR and IRMS)

Allyl isothiocyanate is the major component of the mustard oil. This molecule can be synthesized at a much lower price than its cost when extracted from mustard seeds. Adulteration of natural mustard oil by adding synthetic allyl isothiocyanate is therefore very profitable. In order to detect such a...

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Bibliographic Details
Published inJournal of agricultural and food chemistry Vol. 45; no. 5; pp. 1844 - 1848
Main Authors Remaud, Gérald S, Martin, Yves-Loïc, Martin, Gilles G, Naulet, Norbert, Martin, Gérard J
Format Journal Article
LanguageEnglish
Published Washington, DC American Chemical Society 01.05.1997
Subjects
ACEITE DE MOSTAZA
Applied sciences
Chemical industry and chemicals
ESPECTROMETRIA
ESPECTROSCOPIA RMN
Essential oils, perfumes
Exact sciences and technology
FRACCIONAMIENTO
FRACTIONATION
FRACTIONNEMENT
HUILE DE MOUTARDE
ISOTOPE RATIO MASS SPECTROMETRY
MUSTARD OIL
NMR SPECTROSCOPY
NUCLEAR MAGNETIC RESONANCE
SITE SPECIFIC NATURAL ISOTOPE FRACTIONATION
SPECTROMETRIE
SPECTROMETRY
SPECTROSCOPIE RMN
Washing products. Cosmetics and toiletries. Perfumes
Allyl complex
Isotopic analysis
Investigation method
Essential oil
Mustard oil
NMR spectrometry
Vegetal oil
Adulteration
Isothiocyanates
Mass spectrometry
Principal component analysis
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Summary:Allyl isothiocyanate is the major component of the mustard oil. This molecule can be synthesized at a much lower price than its cost when extracted from mustard seeds. Adulteration of natural mustard oil by adding synthetic allyl isothiocyanate is therefore very profitable. In order to detect such a fraud, a new analytical approach has been developed using both SNIF-NMR (site-specific natural isotope fractionation studied by nuclear magnetic resonance) and IRMS (isotopic ratio mass spectrometry). This approach enables an unambiguous distinction between natural and synthetic allyl isothiocyanate. It also makes it possible to identify the geographical origin of natural mustard oils. The principle of the interpretation is based on a multivariate analysis of the isotopic parameters of allyl isothiocyanate, (D/H) i , δ13C, δ15N, and δ34S, which provide largely independent information. The discriminating performances of the different isotopes are discussed. Keywords: Allyl isothiocyanate; mustard oil; SNIF-NMR; 13C-, 15N-, 34S-IRMS; authentication; adulteration; geographical origin
Bibliography:Q04
1997076658
ark:/67375/TPS-3R2M45Q6-6
Abstract published in Advance ACS Abstracts, April 1, 1997.
istex:210D740949A98960F736BD94644AB9B7CAD0024C
ISSN:0021-8561
1520-5118
DOI:10.1021/jf960448c