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《Journal of University of Electronic Science and Technology of China》 2004-03
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Determination of Trace Amounts of Thallium by Differential Pulse Polarographiy

He Wei,Fan Zhongxiao,Huo Caihong (School of Microelectronics and Solid-State Electronics, UEST of China Chengdu 610054)  
After Tl(I)- morpholine-4-carbodithioate complex is formed by the complex reaction of Tl(I) with morpholine-4-carbodithioate, the Tl(I) complex is quantitatively adsorbed onto microcrystalline naphthalene in the range of pH=5~10.The trace amount of thallium is determined by differential pulse polarography on DME after the adsorption of its morpholine-4-carbodithioate is decomposed in 15 ml of 1.5 mol/L HCl. The detection limit of thallium is 0.025 mg/ml and the linear range of concentration is 0.05~10 mg/ml with a correlation coefficient of 0.999 5 and a relative standard deviation of 0.90.
【CateGory Index】: O657.14
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