浊点萃取电热原子吸收光谱法测定水中痕量铊  

Determination of trace amount of thallium in water samples by electrothermal atomic absorption spectrometry with cloud point extraction

作　　者：陈海婷[1,2] 陈建国[1] 林力[1] 金献忠[1] 魏丹毅[2] 

机构地区：[1]宁波出入境检验检疫局,宁波315012 [2]宁波大学材料科学与化学工程学院,宁波315211

出　　处：《分析试验室》2009年第11期60-62,共3页Chinese Journal of Analysis Laboratory

基　　金：浙江省分析测试基金(04045)项目资助

摘　　要：采用吡咯烷基二硫代氨基甲酸铵（APDC）为螯合剂,Triton X-114作为表面活性剂,建立了浊点萃取预富集电热原子吸收光谱法测定水中痕量铊的方法。在优化的实验条件下,方法的检出限可达0.07μg/L,相对标准偏差为3.6%（4μg/L,n=7）,加标回收率为93%-106%,富集倍率为31。该方法成功应用于自来水和河水中痕量铊的测定。Cloud point extraction （CPE） has been used for pre-concentration of trace amount of thallium in water sampies after the formation of a complex with ammonium pyrrolidine dithiecatbamate, and then analysed by electrothermal absorption spectrometry （ETAAS） using octylphenoxypolyethoxyethanol （Triton X-114） as a surfactant. The effects of experimental conditions on cloud point extraction and atomization processes were optimized carefully. Under the optimum conditions, the limit of detection was 0.07 μg/L （3a）, the relative standard deviation was found to be 3.6% for a sample containing 4.0 μg/L TI（ Ⅲ ） （ n = 7）. The recoveries was ranged from 93% to 106%, and the preconcentration factor was 31. The method has been successfully applied to the determination of trace amount of thallium in tap and river water samples, and the satisfactory recoveries have been obtained.

关 键 词：浊点萃取 铊 电热原子吸收光谱法 

分 类 号：O657.3[理学—分析化学]