摘要：In the present work, totally 16 commercial virgin olive oil samples produced by three phase extraction system from monocultivar (Gemlik cv) olives in various locations of East Mediterranean subzone (n=2) and East Aegean region (n=3), Kap.da¤ Peninsula (n=4), East Marmara subzone (n=5) and Thrace region (n=2) of Turkey during 2009-2010 crop years were examined in terms of oxidative stability (rancimat) and some fatty acid profiles. Oxidative stability (rancimat) values of oil samples were between 7.67 hours (East Aegean Region) and 10.67 hours (Kap.da¤ Peninsula). From maximum to minimum oxidative stability of oils samples according to the cultivars followed Tekirda¤< East Aegean< Bursa< East Mediterranean< Kap.da¤ Peninsula. Oleic acid and oleic /linoleic ratio ranged between % 70.41 (East Mediterranean) - % 74.59 (Bursa) and 7.7 1(East Aegean)-10.41 (Kap.da¤ Peninsula) , respectively. Also, the range of some parameters calculated based on fatty acid profile were iodine numbers 78.06 (East Mediterranean) - 82 .2 2 ( East Aegean), Oxidative susce ptibility ( Ox Suc) 4 36.10 (Te kirda¤) - 577.06 (East Aegean), Oxidizability (Cox value) 1.57 (Tekirda¤), 1.85 (East Aegean) and Theoretical Oxidative Stability Indexes (TOSI) 11.17 hours (Bursa) - 12.00 hours (East Mediterranean), respectively.
关键词：Gemlik o live cultivar; virgin olive oil; oxidative stabilit y; fat ty acid profile; rancimat; ; theoretical oxidative stability index
