Low vs high field 1h 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

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)
4 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 - Aug 2019

Keywords

  • NMR
  • Authentication
  • Cold pressed rapeseed oil
  • Chemometrics
  • Fraud
  • VIRGIN OLIVE OIL
  • VEGETABLE-OILS
  • RAPID DETECTION
  • EDIBLE OILS
  • AUTHENTICATION
  • QUANTIFICATION
  • QUALITY
  • CANOLA
  • ATR

Cite this