期刊
FOOD CHEMISTRY
卷 204, 期 -, 页码 263-273出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2016.02.131
关键词
Extra virgin olive oil; Geographic origin; FGC E-nose; SPME/GC-MS; Headspace volatile compounds; Non-target analysis; PCA; PLS-DA
At present, the geographical origin of extra virgin olive oils can be ensured by documented traceability, although chemical analysis may add information that is useful for possible confirmation. This preliminary study investigated the effectiveness of flash gas chromatography electronic nose and multivariate data analysis to perform rapid screening of commercial extra virgin olive oils characterized by a different geographical origin declared in the label. A comparison with solid phase micro extraction coupled to gas chromatography mass spectrometry was also performed. The new method is suitable to verify the geographic origin of extra virgin olive oils based on principal components analysis and discriminant analysis applied to the volatile profile of the headspace as a fingerprint. The selected variables were suitable in discriminating between 100% Italian and non-100% Italian oils. Partial least squares discriminant analysis also allowed prediction of the degree of membership of unknown samples to the classes examined. (C) 2016 Published by Elsevier Ltd.
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