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Authors acknowledge the financial support the Ministerio de Economia y Competitividad-Feder (project CTQ2011-25743 and project CTQ2012-38635) and Generalitat Valenciana (project PROMETEO-II 2014-077). Alba Mir-Marques acknowledges the grant 'Atraccio de Talent' (PREDOC13-110514) provided by the University of Valencia.

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Authentication of protected designation of origin artichokes by spectroscopy methods

Publicat a:Food Control. 59 74-81 - 2016-01-01 59(), DOI: 10.1016/j.foodcont.2015.05.004

Autors: Mir-Marques, Alba; Elvira-Saez, Cristina; Cervera, M Luisa; Garrigues, Salvador; de la Guardia, Miguel

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Artichoke samples with the protected designation of origin (PDO) 'Alcachofa de Benicarlo' were discriminated from those produced in other towns surrounding Valencia and Murcia, outside the PDO frame. Inductively coupled plasma (ICP-OES), near infrared (NIR) and X-ray fluorescence (XRF) were assayed in order to achieve a correct sample classification of the three different origin sample groups (Benicarlo, Valencia and Murcia). Chemometrics was used to compare the ability of classification of artichoke from their origin by using concentration data of mineral elements, determined by ICP-OES, NIR spectra and XRF spectra. Multivariate analysis tools, as principal component analysis (PCA), hierarchical cluster analysis (HCA) and partial least square discriminant analysis (PLSDA), were used for chemometric data treatment. This study evidenced that the mineral profile of artichokes is a good way for the correct identification of sample origin and that the direct use of XRF spectra of the lyophilised edible part of artichoke can be used as a cheap and green alternative for the authentication of samples produced in the PDO 'Alcachofa de Benicarlo' and to differentiate from those produced in near areas. (C) 2015 Elsevier Ltd. All rights reserved.

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