气相色谱质谱法快速测定生活饮用水中多种挥发性有机物研究  

Rapid determination of volatile organic compounds in drinking water by gas chromatography-mass spectrometry

作　　者：周亮[1] 朱韩武[1] 钟艳琴 贺春霞[1] 雷飏[1] ZHOU Liang;ZHU Hanwu;ZHONG Yanqin;HE Chunxia;LEI Yang(Chenzhou Municipal Center for Disease Control and Prevention,Chenzhou,Hunan 423001,China)

机构地区：[1]郴州市疾病预防控制中心,湖南郴州423001

出　　处：《现代医药卫生》2023年第3期368-372,377,共6页Journal of Modern Medicine & Health

基　　金：湖南省卫健委科研计划项目(20201731);湖南省郴州市科技局重点科技计划项目(ZDYF2020195)

摘　　要：目的 建立生活饮用水中58种挥发性有机物(VOCs)快速测定的方法,以满足饮用水污染事件中VOCs测定需求。方法 取5 mL水样经吹扫捕集装置处理,VOCs被富集并进样至气相色谱-质谱联用仪进行定性、定量分析。结果 在0~10.0μg/L线性范围内,各组分的标准曲线相关系数均大于或等于0.99,用0.5、2.0、10.0μg/L 3种质量浓度水平加标,回收率为81.3%~113.5%,6次测定的相对标准偏差为1.9%~11.1%,检出限为0.001~0.045μg/L。在30个实际水样中,除1,1-二氯乙烷和氯溴甲烷未检出外,其余有机物均有痕量快速检出,且94.7%的组分质量浓度在2μg/L以下。结论 该方法前处理简单,测定灵敏、准确且迅速,能满足饮用水污染事件中VOCs的定性和定量测定需求。Objective To establish a method for rapid determination of 58 volatile organic compounds(VOCs) in drinking water, so as to meet the needs of VOCs determination in drinking water pollution events.Methods 5 mL water sample was treated by the purge and trap device, VOCs were enriched and injected into gas chromatography-mass spectrometry for qualitative and quantitative analysis.Results The correlation coefficients of standard curve of all components were greater than or equal to 0.99 in the linear range of 0-10.0 μg/L.The recovery rates of three mass concentration levels of 0.5,2.0,10.0 μg/L were in the range of 81.3%-113.5%,the relative standard deviation(RSD) was 1.9%-11.1%,and the detection limits were 0.001-0.045 μg/L.In 30 actual water samples, except for 1,1-dichloroethane and chlorobromomethane, trace were detected rapidly in the remaining organic compounds and 94.7% of the components were less than 2 μg/L.Conclusion The method has the advantages of simple pretreatment, sensitive, accurate and rapid determination, and can meet the qualitative and quantitative determination needs of VOCs in drinking water pollution events.

关 键 词：气相色谱质谱法 挥发性有机物 生活饮用水 快速检测 水质检测 

分 类 号：R115[医药卫生—公共卫生与预防医学]