Oueslati Imen, Haddada Faouzia M, Manaï Hédia, Zarrouk Wissem, Taamalli Wael, Fernandez Xavier, Lizzani-Cuvelier Louisette, Zarrouk Mokhtar
Laboratoire Caracterisation et Qualite de l'Huile d'Olive, Centre de Biotechnologie de Borj-Cedria, B.P.901- 2050, Hammam-Lif, Tunisia.
J Agric Food Chem. 2008 Sep 10;56(17):7992-8. doi: 10.1021/jf801022c. Epub 2008 Aug 9.
The Tataouine province in southern Tunisia is well known for its severe pedoclimatic conditions. Using solid phase microextraction (SPME) and gas chromatography (GC), coupled to flame ionization and mass spectrometer detectors, we characterized virgin olive oils from Chemlali Tataouine, Fakhari Douirat, Zarrazi Douirat, and Dhokar Douirat varieties, which grow in the harsh arid region of Tataouine. Significant differences in the proportions of volatile constituents from oils of different varieties were detected. The results showed that lipoxygenase products were generally the major metabolites of the volatile fraction, and (E)-Hex-2-enal was the principal compound characterizing the olive oil headspace for most samples, though the absolute levels varied greatly, never exceeding 76.45 and 32.16%, respectively. The C5 compounds were unusually abundant, comprising 42.97% of the total lipoxygenase products and a remarkably high level of penten dimers. Each autochthonous variety could thus be differentiated according to the percentage of each metabolite.
突尼斯南部的塔塔温省以其恶劣的土壤气候条件而闻名。我们使用固相微萃取（SPME）和气相色谱（GC），并结合火焰离子化和质谱检测器，对生长在塔塔温干旱地区的Chemlali Tataouine、Fakhari Douirat、Zarrazi Douirat和Dhokar Douirat品种的初榨橄榄油进行了表征。检测到不同品种油中挥发性成分比例存在显著差异。结果表明，脂氧合酶产物通常是挥发性部分的主要代谢产物，并且（E）-己-2-烯醛是大多数样品橄榄油顶空的主要特征化合物，尽管其绝对含量差异很大，分别从未超过76.45%和32.16%。C5化合物异常丰富，占脂氧合酶产物总量的42.97%，并且戊烯二聚体水平非常高。因此，每个当地品种都可以根据每种代谢产物的百分比进行区分。
