气相色谱法测定涂改类文具中8种氯代烃  

Determination of 8 chlorinated hydrocarbons in altered stationery by gas chromatography

作　　者：周呈 顾春思 钱敏 ZHOU Cheng;GU Chunsi;QIAN Min(Shanghai Institute of Quality Inspection and Technical Research,Shanghai 201114,China)

机构地区：[1]上海市质量监督检验技术研究院,上海201114

出　　处：《化学分析计量》2024年第8期12-17,共6页Chemical Analysis And Meterage

基　　金：上海市科学技术委员会研发公共服务平台建设项目(14DZ229300);上海市质量监督检验技术研究院启明星项目(QMX-2023-9-QH)。

摘　　要：采用气相色谱法测定涂改类文具中8种氯代烃含量,对样品前处理条件和气相色谱测试条件进行了优化。以甲醇为溶剂,溴丙烷为内标物,根据出峰灵敏度不同分别称取与内标物同一数量级的各目标化合物,一同进样。选用电子捕获检测器,柱温为60℃,分流进样,可获得分离良好的色谱图。8种氯代烃的质量浓度在一定范围内与响应值线性关系良好,相关系数均大于0.999 0,方法检出限为0.01~5 mg/kg。样品平均加标回收率为96.2%~102.2%,测定结果的相对标准偏差均小于5%(n=7)。该方法能快速有效地测定涂改类文具中的氯代烃含量。The content of 8 chlorinated hydrocarbons in modified stationery was determined by gas chromatography,and the sample pretreatment conditions and gas chromatography testing conditions were optimized.Methanol was used as the solvent,and bromopropane was used as the internal standard.Based on the different peak sensitivities,each target compound of the same order of magnitude as the internal standard was weighed and injected together.Using an electron capture detector(ECD)and split injection,a well separated chromatogram was obtained at a column temperature of 60℃.The mass concentration of 8 chlorinated hydrocarbons had a good linear relationship with the response value within a certain range,and the correlation coefficients were all more than 0.9990.The detection limits of the method were 0.01-5 mg/kg.The average recovery rates of sample spiking were 96.2%-102.2%,and the relative standard deviation of precision measurement results were less than 5%(n=7).This method is easy to operate and can quickly and effectively be used to determine the content of chlorinated hydrocarbons in altered stationery.

关 键 词：涂改类文具 氯代烃 气相色谱法 

分 类 号：O657.7[理学—分析化学]