Journal
FOOD CHEMISTRY
Volume 170, Issue -, Pages 90-96Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2014.08.057
Keywords
Electronic nose; Isotope ratio mass spectrometry; Sweet cherry; Geographic origin; Chemometrics
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Sweet cherries from two Italian regions, Apulia and Emilia Romagna, were analysed using electronic nose (EN) and isotope ratio mass spectrometry (IRMS), with the aim of distinguishing them according to their geographic origin. The data were elaborated by statistical techniques, examining the EN and IRMS datasets both separately and in combination. Preliminary exploratory overviews were performed and then linear discriminant analyses (LDA) were used for classification. Regarding EN, different approaches for variable selection were tested, and the most suitable strategies were highlighted. The LDA classification results were expressed in terms of recognition and prediction abilities and it was found that both EN and IRMS performed well, with IRMS showing better cross-validated prediction ability (91.0%); the EN IRMS combination gave slightly better results (92.3%). In order to validate the final results, the models were tested using an external set of samples with excellent results. (C) 2014 Elsevier Ltd. All rights reserved.
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