Detection of the adulteration of olive oils by solid phase microextraction and multidimensional gas chromatography

被引:58
作者
Flores, G [1 ]
del Castillo, MLR [1 ]
Blanch, GP [1 ]
Herraiz, M [1 ]
机构
[1] CSIC, Inst Fermentac Ind, E-28006 Madrid, Spain
关键词
enantiomers; multidimensional gas chromatography; olive oil adulteration; refined hazelnut oil; solid-phase microextraction;
D O I
10.1016/j.foodchem.2005.04.021
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The presence or absence of filbertone in 21 admixtures of olive oil with virgin and refined hazelnut oils obtained using various processing techniques from different varieties and geographical origins was evaluated by solid phase microextraction and multidimensional gas chromatography (SPME-MDGC). The obtained results showed that the sensitivity achievable with the proposed procedure was enough to detect filbertone and, hence, to establish the adulteration of olive oil of different varieties with virgin hazelnut oils in percentages of up to 7%. The very low concentrations in which filbertone occurs in some refined hazelnut oils made difficult its detection in specific admixtures. In any case, the minimum adulteration level to be detected depends on the oil varieties present in the adulterated samples. In the present study, the presence of R- and S-enantiomers of filbertone could be occasionally detected in olive oils adulterated with 10-20% of refined hazelnut oil. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码:336 / 342
页数:7
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