气相色谱法检测粗苯中苯、甲苯和二甲苯含量

Gas chromatography determination of the content of benzene, toluene and xylene in crude benzene

通过对气化温度、柱室温度以及分流比的优化,建立了非极性色谱柱的气相色谱-氢火焰光度检测器（GC-FPD）检测粗苯中三苯含量的方法.利用所建立的方法对混合标样进行实验.结果表明,方法的准确度和精密度满足要求.

This article focus on optimizing gasification temperature, column temperature, shard ratio and so on. Analyses were carried out by nonpolar column gas chromatograph with fame photometric detector （FPD）. A method for the determination of the content of benzene, toluene and xylene in crude benzene was established. The results show that the accuracy and precision of the method meet the requirements.