顶空毛细管柱气相色谱法测定饮用水中三氯甲烷和四氯化碳的方法改进  

Improvement of Headspace Capillary Column Gas Chromatography for Determination of Chloroform and Carbon Tetrachloride in Drinking Water

作　　者：刘燕 LIU Yan(Pingdu Center for Disease Control and Prevention,Pingdu 266700,China)

机构地区：[1]平度市疾病预防控制中心,山东平度266700

出　　处：《食品安全导刊》2023年第5期79-81,共3页China Food Safety Magazine

摘　　要：目的:改进饮用水中三氯甲烷和四氯化碳的顶空毛细管柱气相色谱检测方法。方法:用微量注射器量取、配制三氯甲烷和四氯化碳混合标准溶液,用顶空瓶封闭保存,用顶空毛细管柱气相色谱法检验。结果:三氯甲烷在6.01~60.10μg·L^(-1)下、四氯化碳在0.202~2.020μg·L^(-1)下,相关系数分别为0.9991~0.9999、0.9991~0.9998,回收率分别为91.3%~103.7%、92.9%~106.0%,检出限分别为7.0×10^(-3)μg·L^(-1)、7.0×10^(-4)μg·L^(-1),精密度分别为2.3%、3.1%。结论:该方法适用于饮用水中三氯甲烷和四氯化碳的测定,且具有良好的线性关系,准确度和精密度高。Objective:Improving the headspace capillary column gas chromatography method for the detection of chloroform and carbon tetrachloride in drinking water.Method:Weigh and prepare a mixed standard solution of chloroform and carbon tetrachloride using a micro syringe,seal and store it in a headspace bottle,conduct headspace capillary column gas chromatography testing.Result:Trichloromethane(test result range:6.01~60.10μg·L^(-1)),carbon tetrachloride(test result range:0.202~2.020μg·L^(-1)),with correlation coefficients ranging from 0.9991 to 0.9999 and 0.9991 to 0.9998.The recovery rates were 91.3%to 103.7%and 92.9%to 106.0%.The detection limit was 7.0×10^(-3)μg·L^(-1) and 7.0×10^(-4)μg·L^(-1),with a precision of 2.3%and 3.1%.Conclusion:This method is suitable for the determination of chloroform and carbon tetrachloride in drinking water,and has good linear relationship,accuracy,and precision.

关 键 词：顶空毛细管柱气相色谱 三氯甲烷 四氯化碳 

分 类 号：TU991.2[建筑科学—市政工程] O657.71[理学—分析化学]