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《Precious Metals》 1992-04
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Determination of Ultratrace Amounts of Indium with Osciliopolagraphic Detection

Jiang Zhiliang, Wang Lisheng, Liang Li and Den Ye (Department of Chemistry, Guangxi Normal University, Guilin, 541004)  
It was found that the depletion of As (Ⅲ) concentration in the catalytic reaction system of Ce (Ⅳ) —As (Ⅲ) —Ir (Ⅳ) —HClO_4 can be monitored by single-sweep oscillopolarography. A new and highly sensitive catalytic method with oscillopolarographic detection has been developed by the initial rate procedure, A detection limit of 0.02ng/ml Ir was achieved. The activation energy for the cata lytic reaction was 40.21 kJ·mol~(-1). The mechanism was also discussed.
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