顶空气相色谱法测定水相中环氧氯丙烷  

Determinnation of Epichlorohydrin in Water by Headspace Gas Chromatography

作　　者：李萍[1] 赵文[1] 金珊珊[1] 郭登峰[1] 

机构地区：[1]常州大学石油化工学院,江苏常州213164

出　　处：《常州大学学报（自然科学版）》2011年第1期71-73,共3页Journal of Changzhou University：Natural Science Edition

摘　　要：采用顶空气相色谱法测定水相中的环氧氯丙烷的含量,对顶空色谱分析条件如平衡时间、平衡温度、盐析剂用量以及气液相比等因素进行了研究。结果表明:在平衡时间为20 min,平衡温度为80℃,盐析剂为氯化钠且加入量为7 g,气液相比为1∶2的条件下,水相中环氧氯丙烷响应值最高。环氧氯丙烷质量浓度在0.001-100μg/mL呈良好线性关系,线性方程为y=37.39x+47.79,相关系数为0.999 4,方法的最低检出质量浓度达0.001μg/mL,加标回收率为92.54%-106.8%。该分析方法简单、快速、准确、灵敏度高,对测定水中的环氧氯丙烷的含量具有重要的意义。A method for determination of epichlorohydrin in water using headspace gas chromatography have been studied.The optimal condition for headspace equilibrium was as follows： equilibrium time was 20 min,equilibrium temperature was 80 ℃,7 g sodium chloride was added as salting agent and gas-liquid proportion was 1∶2 and epichlorohydrin in sample had the highest response value on gas chromatography.The linearity was good at 0.001-100 μg/mL for epichlorohydrin,the linear equation was y=37.39x＋47.79 and the linear correlation coefficient was 0.999 4.The average recovery ranged between 93.1%-102.9% and the detecting limit was 0.001 μg/mL.The method proved sensitive,accurate,reproducible and suitable for determination of epichlorohydrin in water.

关 键 词：顶空气相色谱 环氧氯丙烷 分析 

分 类 号：TQ415[化学工程]