Low vs high field 1 h Nmr spectroscopy for the detection of adulteration of cold pressed rapeseed oil with refined oils

Daniel McDowell, Marianne Defernez, E. Kate Kemsley, Christopher T. Elliott, Anastasios Koidis*

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Citations (Scopus)
23 Downloads (Pure)

Abstract

Cold pressed rapeseed oil (CPRO)is a relatively recent development in rapeseed processing, which produces a quality product with a high market value. High field NMR (400 MHz)is a well-established tool in food analysis, while low-field NMR (60 MHz)is much less studied. This study aims to establish the effectiveness of both techniques in identifying binary adulteration in CPRO. Three adulteration scenarios were investigated: a)CPRO and refined rapeseed oil (RRO); b)CPRO and refined sunflower oil (RSO); and c)CPRO and RRO or RSO. A range of classification techniques were trialled as well as partial least squares regression to gauge predictive quantification performance. The 400 MHz NMR achieved classification rates of 100% in the scenarios with a single adulterant, and 93% in the multiple adulterant scenario. The 60 MHz NMR produced lower but still encouraging classification rates (RSO 92%; RRO 85%; both RRO and RSO 87%).

Original languageEnglish
Pages (from-to)490-499
Number of pages10
JournalLWT
Volume111
Early online date14 May 2019
DOIs
Publication statusPublished - 01 Aug 2019

Keywords

  • Authentication
  • Chemometrics
  • Cold pressed rapeseed oil
  • Fraud
  • NMR

ASJC Scopus subject areas

  • Food Science

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