河北省部分地区食用植物油中3-氯丙醇酯的污染水平研究

目的调查河北省部分地区市售食用植物油中3-氯丙醇酯的污染情况。方法称叐0.1 g植物油样品,用0.5 mol/L甲醇钠溶液将脂肪中的3-氯丙醇酯水解成游离的3-氯丙醇,用硅藻土小柱净化后,丂氟丁酰基咪唑迚行衍生化处理,气相色谱-质谱联用法检测3-氯丙醇酯含量,同位素内标法定量。结果测得市售的32份植物油样品中,全部检出含有3-氯丙醇酯,检出范围0.15～1.32 mg/kg, 3-氯丙醇酯平均值为0.47 mg/kg。结论食用植物油中3-氯丙醇酯污染问题必须引起持续关注,其中菜籽油和花生油污染问题较为突出,因此有必要加大监测力度,以获叐更多数据,制定限量标准,保障食品安全。

Pollution of 3-chloro-1, 2-propanediol ester in edible vegetable oils in some areas of Hebei province

Objective To investigate the contamination of 3-monochloro-1, 2-propandiol ester (3-MCPD ester) in edible vegetable oil on sale in some areas of Hebei province. Methods 0.1 g vegetable oil sample was obtained, then 0.25 mol/L sodium methanol solution was used to hydrolyze 3-MCPD ester into free 3-MCPD. After purification with diatomite column and derivatization by fluorobutyl imidazole (HFBI), the content of 3-chloropropanol ester was determined by gas chromatography-mass spectrometry and quantified by isotope internal standard method. Results Among the 32 samples of vegetable oil, 3-MCPD ester was found in all of the samples with a detection range of 0.15?1.32 mg/kg. The average value of 3-MCPD ester was 0.47 mg/kg. Conclusion The pollution of 3-chloropropanol ester in edible vegetable oil must be concerned continuously, especially the pollution of rapeseed oil and peanut oil. Therefore, it is necessary to increase monitoring efforts to obtain more data and set limit standards to ensure food safety.