Journal
FOOD CHEMISTRY
Volume 157, Issue -, Pages 485-489Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2014.02.068
Keywords
Saffron; Elemental analysis; Geographical origin; Multivariate statistics
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27 Saffron spices produced in three Italian regions, Abruzzo (L'Aquila), Umbria and Sardinia, were analysed by inductively coupled plasma-mass spectrometry to test potentiality of mineral composition for geographical traceability. A linear discriminant analysis (LDA) based on concentrations of 12 selected elements, Li, B, Na, Ga, Rb, Sr, Zr, Nb, Cs, Ba, Sm, and Hf, allows more than 80% of correct predictions in leave-one cross-validation. Four elements (B, Na, Sr and Rb), identified by step-wise LDA, provide more than 90% of correct predictions. Moreover, saffron spices cultivated in Sardinia and Central Italy can be distinguished under more severe validation conditions (20% of samples in the prediction set). In summary, mineral composition results a promising indicator of saffron geographical origin. (C) 2014 Elsevier Ltd. All rights reserved.
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