Chloropropanol and glycidyl esters content in edible vegetable oils in China in 2015-2017

Abstract

To investigate the occurrence data for fatty acid esters of chloropropanol and glycidyl in edible vegetable oils purchased in China. The 1309 samples of edible vegetable oil were collected and the data of chloropropanol and glycidyl were detected by the gas chromatography-mass spectrometry from 2015 to 2017. The detection rate of 3-monochloropropanediol esters in vegetable oils was 81. 83% with the mean level of 1. 21 mg/kg. The mean content of tea-seed oil was significantly higher than that of other varieties, followed by peanut oil(1. 36 mg/kg), rapeseed oil(1. 12 mg/kg). The sunflower seed oil has the lowest mean content(0. 54 mg/kg). The detection rate of 2-monochloropropanediol esters in vegetable oils was 82. 84% with the mean level of 0. 39 mg/kg. The content of peanut oil was significantly higher than that of other varieties, followed by blended oil(0. 30 mg/kg) and soybean oil(0. 25 mg/kg). There was no significant difference with rapeseed oil(0. 66 mg/kg). The exceeding rate of glycidyl ester was 19. 90% with the mean level of 0. 68 mg/kg. The average content of glycidyl ester in blended oil(0. 78 mg/kg) was significantly higher than that in peanut oil(0. 54 mg/kg). There was no significant difference among other varieties. The pollution of chloropropanol esters is common in edible vegetable oils in China. The contamination is different in kinds of edible oils.