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浊点萃取电热原子吸收光谱法测定水中痕量铊
引用本文:陈海婷,陈建国,林力,金献忠,魏丹毅.浊点萃取电热原子吸收光谱法测定水中痕量铊[J].分析试验室,2009,28(11).
作者姓名:陈海婷  陈建国  林力  金献忠  魏丹毅
作者单位:1. 宁波出入境检验检疫局,宁波,315012;宁波大学材料科学与化学工程学院,宁波,315211
2. 宁波出入境检验检疫局,宁波,315012
3. 宁波大学材料科学与化学工程学院,宁波,315211
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。

关 键 词:浊点萃取    电热原子吸收光谱法

Determination of trace amount of thallium in water samples by electrothermal atomic absorption spectrometry with cloud point extraction
CHEN Hai-ting,CHEN Jian-guo,LIN Li,JIN Xian-zhong,WEI Dan-yi.Determination of trace amount of thallium in water samples by electrothermal atomic absorption spectrometry with cloud point extraction[J].Chinese Journal of Analysis Laboratory,2009,28(11).
Authors:CHEN Hai-ting  CHEN Jian-guo  LIN Li  JIN Xian-zhong  WEI Dan-yi
Institution:CHEN Hai-ting1,2,CHEN Jian-guo1,LIN Li1,JIN Xian-zhong1 and WEI Dan-yi2(1.Ningbo Entry-Exit Inspection and Quarantine Bureau,Ningbo 315012,2.Faculty of Materials Science and Chemical Engineering,Ningbo University,Ningbo 315211)
Abstract:Cloud point extraction (CPE) has been used for pre-concentration of trace amount of thallium in water samples after the formation of a complex with ammonium pyrrolidine dithiocarbamate, 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 Tl(Ⅲ) (n=7) . The recoveries was ranged from 93% to 106% , and the preconcentra-tion 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.
Keywords:Cloud point extraction  Thallium  Electrothermal atomic absorption spectrometry  
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