分子蒸馏法脱除油脂中3-氯丙醇酯和缩水甘油酯

Removal of 3-Monochloro-1,2-propanediol Esters and Glycidyl Esters from Corn Oil by Molecular Distillation

利用分子蒸馏法脱除玉米油中的3-氯丙醇(3-monochloro-1,2-propanediol,3-MCPD)酯和缩水甘油酯(glycidyl esters,GEs)。结果显示,在蒸馏温度220℃、刮膜转速230 r/min、进料速率50滴/min的条件下,玉米油中GEs的脱除率为85.0%,其含量从5.909 mg/kg降低至0.885 mg/kg,达到欧盟规定食用植物油中GEs≤1 mg/kg的限量要求;3-MCPD酯脱除率为79.3%,其含量从2.686 mg/kg降低至0.556 mg/kg。分子蒸馏后油脂中VE含量从407.8 mg/kg降低至291.3 mg/kg,甾醇含量从912.2 mg/100 g降低至563.7 mg/100 g,损失率分别为28.6%、38.2%。分子蒸馏可以作为脱除油脂中3-MCPD酯和GEs的有效可靠方法。

3-Monochloro-1,2-propanediol(3-MCPD)esters and glycidyl esters(GEs)were removed from corn oil by molecular distillation.The results showed that under the conditions of molecular distillation temperature of 220℃,scraping speed of 230 r/min and feeding speed of 50 drop/min,the removal rate of GEs was 85.0%,and its content was reduced from 5.909 to 0.885 mg/kg,which was lower than the EU maximum limit of 1 mg/kg of GE for edible oils.The removal rate of 3-MCPD ester was 79.3%,and its content was reduced from 2.686 to 0.556 mg/kg.After molecular distillation,the content of sterols and VE decreased by 38.2%(from 912.2 to 563.7 mg/100 g)and 28.6%(from 407.8 to 291.3 mg/100 g).These results show that molecular distillation can be used as an effective and reliable method for removing 3-MCPD esters and GEs from edible oils.