承德市食用植物油中氯丙醇酯和缩水甘油酯污染水平与暴露风险评估

目的对承德市售食用植物油中氯丙醇酯和缩水甘油酯进行污染水平分析。方法样品加入适量内标液后,经碱水解脂肪,固相萃取柱脱水净化后,用七氟丁酰基咪唑进行衍生化处理,供气相色谱-质谱仪进样分析。结果在检测的市售的30份植物油样品中,3-氯丙醇酯、2-氯丙醇酯和缩水甘油酯的检出率为100%、93%(28/30)及83%(25/30)。3-氯丙醇酯及2-氯丙醇酯含量范围分别在0.15～1.06 mg/kg和0.03-0.66 mg/kg,缩水甘油酯含量范围在0.03～1.85 mg/kg。结论氯丙醇酯和缩水甘油酯污染在承德市食用植物油中广泛存在,检出率在80%以上,这意味着虽然通过食用植物油摄入氯丙醇酯和缩水甘油酯的健康风险不高,但仍然不能忽视这种风险。检测部门应加大对这两种物质的检测力度,以保障人民的健康安全。

Contamination and dietary exposure assessment of chloropropanol esters and glycidol esters in edible vegetable oils in Chengde city

Objective To investigate and evaluate the contamination situation of chloropropanol esters and glycidol esters(Gly) residues in edible vegetable oil on sale in Chengde of Hebei Province. Methods Samples were added with appropriate amount of internal standard solution, conducted by alkaline to hydrolyze fat, then dehydrated and purified by solid phase extraction column. After derivation with heptafluoro butyrylimidazole(HFBI), the target analytes were detected by gas chromatography with mass spectrometry (GC-MS). Results The detection rates of 3-chloropropane-1,2-diol ester(3-MCPDE), 2-MCPDE and glycidol esters (Gly) in 30 samples of vegetable oil were 100%, 93%(28/30) and 83% (25/30) respectively. The contents of 3-MCPDE, 2-MCPDE and Gly were 0.15-1.06 mg/kg and below 0.03-0.66 mg/kg, respectively. The content of glycidyl ester was below 0.03-1.85 mg/kg. Conclusion The contamination of chloropropanol ester and glycidyl ester are widely exist in edible vegetable oil in Chengde, with the detection rate over 80%, which means that the possible health risk cannot be ignored although the current dietary intake of Gly and MCPDE from vegetable oil has acceptable effect on health. The detection department should strengthen the detection of these two substances to ensure people''s health and safety.