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建立了顶空-气相色谱法测定环氧树脂涂料中环氧氯丙烷单体残留量的方法。结果表明,环氧氯丙烷含量在2.5~500μg范围内,线性方程为y=0.207 7x+0.348 2,相关系数为r=0.999 5;方法检出限为5 mg/kg;平均回收率为91.0%~98.1%;相对标准偏差(n=6)为1.3%~3.0%。该方法简便、快速,重复性好,可用于环氧树脂涂料中残留环氧氯丙烷单体的快速分析。
A method for the determination of residual epichlorohydrin monomer in epoxy resin coatings by headspace gas chromatography was established. The results showed that the linear equation was y = 0.207 7x + 0.348 2 and the correlation coefficient was 0.999 5 with the detection limit of 5 mg / kg and the average recovery was 91.0% with the content of epichlorohydrin in the range of 2.5-500 μg. ~ 98.1%; relative standard deviation (n = 6) was 1.3% ~ 3.0%. The method is simple, rapid and reproducible, and can be used for rapid analysis of residual epichlorohydrin monomer in epoxy resin coatings.