Development of a comprehensive analytical platform for the detection and quantitation of food fraud using a biomarker approach. The oregano adulteration case study

Ewa Wielogorska, Olivier Chevallier, Connor Black, Pamela Galvin-King, Marc Delêtre, Colin T Kelleher, Simon A Haughey, Christopher T Elliott

Research output: Contribution to journalArticle

23 Citations (Scopus)
325 Downloads (Pure)

Abstract

Due to increasing number of food fraud incidents, there is an inherent need for the development and implementation of analytical platforms enabling detection and quantitation of adulteration. In this study a set of unique biomarkers of commonly found oregano adulterants became the targets in the development of a LC-MS/MS method which underwent a rigorous in-house validation. The method presented very high selectivity and specificity, excellent linearity (R(2)>0.988) low decision limits and detection capabilities (<2%), acceptable accuracy (intra-assay 92-113%, inter-assay 69-138%) and precision (CV<20%). The method was compared with an established FTIR screening assay and revealed a good correlation of quali- and quantitative results (R(2)>0.81). An assessment of 54 suspected adulterated oregano samples revealed that almost 90% of them contained at least one bulking agent, with a median level of adulteration of 50%. Such innovative methodologies need to be established as routine testing procedures to detect and ultimately deter food fraud.

Original languageEnglish
Pages (from-to)32-39
JournalFood Chemistry
Volume239
Early online date15 Jun 2017
DOIs
Publication statusPublished - 15 Jan 2018

Keywords

  • Journal Article

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