气相色谱-质谱法对PVDC材料中18种邻苯二甲酸酯类化合物的测定

Determination of Phthalate Esters in Food Contact Materials by Gas Chromatography-Mass Spectrometry

建立了气相色谱-质谱法测定聚偏二氯乙烯（PVDC）材料中18种邻苯二甲酸酯类含量的检测方法。使用正己烷超声提取，GC-MS外标法定量。在优化的实验条件下，18种邻苯二甲酸酯类化合物在5～20mg／L范围内具有良好的线性关系，相关系数大于等于0．9947，检出限（S／N=3）为0．07—4．84mg／L，回收率在64．6％～106．1％的范围内，相对标准偏差（RSD）为2．31％～6．07％。结果表明，该方法操作简便，精密度好，准确度高，满足了当前对PVDC材料中邻苯二甲酸酯类化合物含量的检测需求。

A gas chromatography-mass spectrometry method was developed for the determination of eighteen kinds of phthalate esters in polyvinylidene chloride （PVDC） materials. Samples were extracted by ultrasonic extraction with n-hexane, and the external standard method was used for quantitative analysis. Under the optimized experimental conditions, the 18 kinds of phthalate esters have a good linear relationship in the range of 1 - 250 mg/L, the correlation coefficient is greater than or equal to 0. 994 7, and the limit of detection （S/N=3） is 0.07 ~4.84 mg/L. The recovery of this method is in the range of 64.59% 106. 14%, with the relative standard deviation （RSD） of 2. 31% ~ 6.07%. The results show that the method is simple and accurate, and it can meet the current demand for the detection of the phthalate esters compound in the PVDC materials.