High-throughput screening of argan oil composition and authenticity using benchtop 1H NMR

Yvonne Gunning, Alex J. Jackson, Joshua Colmer, Fouad Taous, Mark Philo, Rachel M. Brignall, Tibari El Ghali, Marianne Defernez, E. Kate Kemsley

Research output: Contribution to journalArticle

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Abstract

We use 60-MHz benchtop nuclear magnetic resonance (NMR) to acquire(1)H spectra from argan oils of assured origin. We show that the low-field NMR spectrum of neat oil contains sufficient information to make estimates of compositional parameters and to inform on the presence of minor compounds. A screening method for quality and authenticity is presented based on nearest-neighbour outlier detection. A variety of oil types are used to challenge the method. In a survey of retail-purchased oils, several instances of fraud were found.

Original languageEnglish
Pages (from-to)1177-1186
Number of pages10
JournalMagnetic Resonance in Chemistry
Volume58
Issue number12
Early online date27 Mar 2020
DOIs
Publication statusPublished - Dec 2020

Keywords

  • argan oil
  • authenticity
  • benchtop NMR spectroscopy
  • edible oil
  • proton NMR
  • triglyceride
  • unsaturates
  • FATTY-ACID-COMPOSITION
  • H-1-NMR
  • IDENTIFICATION
  • SPECTROSCOPY
  • STABILITY

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