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Title: Revealing adulterated olive oils by triacylglycerol screening methods: Beyond the official method
Author: Torres-Cobos, Berta
Quintanilla-Casas, Beatriz
Vicario, Giula
Guardiola Ibarz, Francesc
Tres Oliver, Alba
Vichi, S. (Stefania)
Keywords: Oli d'oliva
Espectrometria de masses
Olive oil
Mass spectrometry
Issue Date: 2023
Publisher: Elsevier B.V.
Abstract: Official control methods to detect olive oil (OO) adulteration fail to provide satisfactory consumer protection. Thus, faster and more sensitive screening tools are needed to increase their effectiveness. Here, the official method for adulterant detection in OO was compared with three untargeted screening methods based on triacylglycerol analysis using high-throughput (FIA-HESI-HRMS; HT-GC-MS; HPLC-RID) and pattern recognition techniques (PLS-DA). They were assayed on a set of genuine and adulterated samples with a high natural variability (n = 143). The sensitivity of the official method was 1 for high linoleic (HL) blends at ≥2 % but only 0.39 for high oleic (HO) blends at ≥5 %, while specificity was 0.96. The sensitivity of the screening methods in external validation was 0.90-0.99 for the detection of HL and 0.82-0.88 for HO blends. Among them, HT-GC-MS offered the highest sensitivity (0.94) and specificity (0.76), proving to be the most suitable screening tool for OO authentication.
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It is part of: Food Chemistry, 2023, vol. 409, p. 135256
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ISSN: 0308-8146
Appears in Collections:Articles publicats en revistes (Nutrició, Ciències de l'Alimentació i Gastronomia)

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