Quantification of 3-Monochloropropane-1,2-diol Esters in Edible Oils by Large-Volume Injection Coupled to Comprehensive Gas Chromatography-Time-of-Flight Mass Spectrometry
作者:Sjaak de Koning
DOI:10.1002/cplu.201300351
日期:2014.6
3‐Monochloropropane‐1,2‐diol (3‐MCPD) esters are a group of process contaminants formed during the refining of edible oils and fats. A method for the determination of 3‐MCPD esters in such oils and fats based on large‐volume injection–comprehensive gas chromatography–time‐of‐flight mass spectrometry (LVI–GC×GC–ToF MS) is presented. The simplified method for sample preparation consists of alkaline hydrolysis
3-一氯丙烷-1,2-二醇(3-MCPD)酯是在食用油脂的精制过程中形成的一组过程污染物。提出了一种基于大体积进样-综合气相色谱-飞行时间质谱(LVI-GC×GC-ToF MS)测定此类油脂中3-MCPD酯的方法。简化的样品制备方法包括碱水解,然后从脂质基质中提取3-MCPD,然后使用苯基硼酸衍生化。检测限为0.8μgkg -1,报告为游离3-MCPD。对于约0.5μgg -1 3-MCPD的水平,重复性优于2.7%的相对标准偏差。GC×GC–ToF MS系统在100多次分析中显示稳定。