小体积液液萃取气相色谱法测定生活饮用水中的三氯乙醛  

Determination of by small volume liquid-liquid extraction gas chromatography chloral hydrate in drinking water

作　　者：姜丽丽 李少飞 李维晓 Jiang Li-li;Li Shao-fei;Li Wei-xiao(Yantai Fengmao Environmental Technology Protection Company,Yantai,Shandong 264000,China;Yantai Ecological Environment Monitoring Center of Shandong Province,Yantai,Shandong 264000,China;Yantai Clean Energy Testing Center Company,Yantai,Shandong 264000,China)

机构地区：[1]烟台丰茂环保科技有限公司,山东烟台264000 [2]山东省烟台生态环境监测中心,山东烟台264000 [3]烟台市清洁能源检测中心有限公司,山东烟台264000

出　　处：《福建分析测试》2023年第2期30-34,共5页Fujian Analysis & Testing

摘　　要：建立了小体积液液萃取气相色谱法快速测定生活饮用水中三氯乙醛的分析方法。方法采用样品管作为萃取容器,甲基叔丁基醚作为萃取溶剂,超声波萃取,经过DM-5毛细管柱(30 m×0.25 mm×0.25μm)分离后,电子捕获检测器(ECD)检测。三氯乙醛的质量浓度在0.001~0.05 mg·L^(-1)范围内与色谱峰面积具有良好的线性关系,相关系数为0.9993,方法检出限为0.02μg·L^(-1)。空白样品加标回收率为85.0%~98.2%,测定结果相对标准偏差为1.8%~5.8%。该方法灵敏度高,精密度好,快速、准确、高效,适用于生活饮用水中三氯乙醛的快速测定。A method for rapid determination of chloral hydrate in drinking water by small volume liquid-liquid extraction gas chromatography was established.The sample tube was used as the extraction container and methyl tert butyl ether(MBTE)as the extraction solvent.Ultrasonic extraction was carried out through DM-5 capillary column(30 m×0.25 mm×0.25 um)after separation,it is detected by electron capture detector(ECD).The mass concentration of chloral hydrate has a good linear relationship with the chromatographic peak area in the range of 0.001~0.05 mg•L^(-1),the correlation coefficient is 0.9993,and the detection limit of the method is 0.02 ug•L^(-1).The recovery of blank samples was 85.0%~98.2%,and the relative standard deviation of the determination results was 1.8%~5.8%.The method has high sensitivity,good precision,fast,accurate and efficient.It is suitable for the rapid determination of chloral hydrate in drinking water.

关 键 词：气相色谱 液液萃取 电子捕获检测器 

分 类 号：O657.71[理学—分析化学]