提出了气相色谱-质谱法测定食品中16种邻苯二甲酸酯(PAE′s)含量的方法。详细叙述了不同基质的食品的处理方法,高脂类样品需经凝胶渗透色谱净化。采用HP-5MS石英毛细管柱进行分离和电子轰击离子源质谱检测。16种PAE′s的线性范围为0.50~20.0 mg·L-1,检出限(3S/N)在6.03~826 μg·kg-1之间。在1,10 mg·kg-1两个浓度水平进行加标回收试验,纯油脂和高脂固体样品中16种PAE′s的平均回收率分别在79.2%~101%和77.8%~97.4%之间,测定值的相对标准偏差(n=6)分别在3.4%~6.9%和4.1%~6.0%之间。

A method of GC-MS for the determination of 16 phthalates (PAE′s) in food was proposed. The pretreatment methods for different matrixes of samples were described in detail, and the high-fatty food was purified by gel permeation chromatography (GPC). HP-5MS quartz capillary column was used for separation, and EI source was used for determination in MS. Linearity ranges of the 16 PAE′s were kept in the same range of 0.50-20.0 mg·L-1, with detection limits (3S/N) ranged from 6.03 to 826 μg·kg-1. Tests for recovery were made at the concentration levels of 1 and 10 mg·kg-1 of the mixed phthalate standards, values of recovery found were in the ranges of 79.2%-101% for pure oil and fat and 77.8%-97.4% for high-fatty food. Values of RSD′s (n=3) found were in the ranges of 3.4%-6.9% and 4.1%-6.0% respectively.