Geographic origins and compositions of virgin olive oils determinated by chemometric analysis of NIR spectra

被引:164
作者
Galtier, O.
Dupuy, N.
Le Dreau, Y.
Ollivier, D.
Pinatec, C.
Kister, J.
Artaud, J.
机构
[1] Univ Paul Cezanne, Lab GOAE, CNRS, UMR 6171, F-13397 Marseille 20, France
[2] Direct Gen Concurrence Consommat & Repress Fraude, Lab Marseille, F-13388 Marseille 13, France
[3] AFIDOL, F-13626 Aix En Provence, France
[4] Univ Paul Cezanne, Lab Chim Analyt Environm, UMR CNRS 6171, IFR PMSE 112, F-13345 Aix En Provence, France
关键词
virgin olive oil; near infrared; partial least square discriminant analysis; chemometric; traceability;
D O I
10.1016/j.aca.2007.02.033
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
The authentication of virgin olive oil samples requires usually the use of sophisticated and time consuming analytical techniques. There is a need for fast and simple analytical techniques for the objective of a quality control methodology. Virgin olive oils present characteristic NIR spectra. Chemometric treatment of NIR spectra was assessed for the quantification of fatty acids and triacylglycerols in virgin olive oil samples (n = 125) and for their classification (PLS1-DA) into five very geographically closed registered designations of origin (RDOs) of French virgin olive oils ("Aix-en-Provence", "Haute-Provence", "Nice", "Nyons" and "Vallee des Baux"). The spectroscopic interpretation of regression vectors showed that each RDO was correlated to one or two specific components of virgin olive oils according to their cultivar compositions. The results were quite satisfactory, in spite of the similarity of cultivar compositions between two denominations of origin ("Aix-en-Provence" and "Vallee des Baux"). Chemometric treatments of NIR spectra allow us to obtain similar results than those obtained by time consuming analytical techniques such as GC and HPLC, and constitute a help fast and robust for authentication of those French virgin olive oils. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码:136 / 144
页数:9
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