Characterisation of cold plasma treated beef and dairy lipids using spectroscopic and chromatographic methods

Chaitanya Sarangapani, David Ryan Keogh, Julie Dunne, Paula Bourke*, P. J. Cullen

*Corresponding author for this work

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

The efficacy of cold plasma for inactivation of food-borne pathogens in foods is established. However, insights on cold plasma-food interactions in terms of quality effects, particularly for oils and fats, are sparse. This study evaluated plasma-induced lipid oxidation of model matrices, namely dairy and meat fats. Product characterisation was performed using FTIR, 1H NMR and chromatographic techniques. The oxidation of lipids by cold plasma followed the Criegee mechanism and typical oxidation products identified included ozonides, aldehydes (hexanal, pentenal, nonanal and nonenal) and carboxylic acids (9-oxononanoic acid, octanoic acid, nonanoic acid), along with hydroperoxides (9- and 13-hydroperoxy-octadecadienoylglycerol species). However, these oxidation products were only identified following extended treatment times of 30 min and were also a function of applied voltage level. Understanding cold plasma interactions with food lipids and the critical parameters governing lipid oxidation is required prior to the industrial adoption of this technology for food products with high fat contents.

Original languageEnglish
Pages (from-to)324-333
Number of pages10
JournalFood Chemistry
Volume235
DOIs
Publication statusPublished - 15 Nov 2017
Externally publishedYes

Keywords

  • H NMR
  • Chromatography
  • Cold plasma
  • Dairy and beef fat
  • FTIR
  • Lipid oxidation

ASJC Scopus subject areas

  • Analytical Chemistry
  • Food Science

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