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Title: Large-scale evaluation of shotgun triacylglycerol profiling for the fast detection of olive oil adulteration
Author: Quintanilla-Casas, Beatriz
Strochi, Giulia
Bustamante Alonso, Julen
Torres-Cobos, Berta
Guardiola Ibarz, Francesc
Moreda, Wenceslao
Martínez-Rivas, José Manuel
Valli, Enrico
Bendini, Alessandra
Gallina Toschi, Tullia
Tres Oliver, Alba
Vichi, S. (Stefania)
Keywords: Oli d'oliva
Espectrometria de masses
Olive oil
Mass spectrometry
Issue Date: 29-Dec-2020
Publisher: Elsevier B.V.
Abstract: Fast and effective analytical screening tools providing new suitable authenticity markers and applicable to a large number of samples are required to efficiently control the global olive oil (OO) production, and allow the rapid detection of low levels of adulterants even with fatty acid composition similar to OO. The present study aims to develop authentication models for the comprehensive detection of illegal blends of OO with adulterants including different types of high linoleic (HL) and high oleic (HO) vegetable oils at low concentrations (2-10%) based on shotgun triacylglycerol (TAG) profile obtained by Flow Injection Analysis-Heated Electrospray Ionisation-High Resolution Mass Spectrometry (FIA-HESI-HRMS) at a large-scale experimental design. The sample set covers a large natural variability of both OO and adulterants, resulting in more than one thousand samples analysed. A combined PLS-DA binary modelling based on shotgun TAG profiling proved to be a fit for purpose screening tool in terms of efficiency and applicability. The external validation resulted in the correct classification of the 86.8% of the adulterated samples (diagnostic sensitivity = 0.87), and the 81.1% of the genuine samples (diagnostic specificity = 0.81), with an 85.1% overall correct classification (efficiency = 0.85).
Note: Reproducció del document publicat a:
It is part of: Food Control, 2021, vol. 123, p. 107851
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ISSN: 0956-7135
Appears in Collections:Articles publicats en revistes (Nutrició, Ciències de l'Alimentació i Gastronomia)

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