(SBO) (n ¼ 29), rapeseed oil (RSO) (n ¼ 23),sunflower oil (SFO) (n ¼ 22), and corn oil (CO) (n ¼ 19) were analyzed between October 2010 and January 2011, using a gas chromatograph (GC) with a flame ionization detector (FID). TFA (>2%) was detected in 17 (18%) samples, ranging from 0.14% to 4.76%. The overall TFA content was 1.15 0.12% for SBO,1.37 0.23% for RSO, 1.41 0.10% for SFO, and 2.01 0.24% for CO