计算机控制恒电流溶出测定痕量汞

计算机控制恒电流溶出测定痕量汞 DETERMINATION OF TRACE AMOUNTS OF MERCURY BY COMPUTER-CONTROLLED CONSTANT CURRENT STRIPPING 胡胜水 Hu Shengshui 1 first-author 武汉大学化学系 武汉大学化学系 Department of Chemistry,Wuhan University Department of Chemistry,Wuhan University 本文使用计算机控制的恒电流溶出装置,建立起简便、快速、灵敏的自动检测系统,可满足于无机离子及有机化合物的分析,并用于痕量汞的测定。与一般使用氧化剂的电位溶出相比,具有噪声低、灵敏度高等特点。方法应用于鱼样中汞的测定,结果较好。 This study described a method for constant current stripping determinatl- on of mercury（Ⅱ）at a gold film glassy carbon electrode by means of computer control.The experiments indicate that this method is very sensitively adapted to stripping determination rot mercury（Ⅱ）,and it can effectively eliminate int- erference from a number of copper（Ⅱ）in electrochemical analysis by applying a special pulse electrclysis potential procedure.The stripping peak height（dr/ dE）is proportional to the concentration of mercury（Ⅱ）in the range from 5μg/L to 1 mg/L.The detection limit is estimated as approximately 0.035 μg/L for a total accumulation time of 30 min.This method has been developed for the determination of trace amounts of mercury（Ⅱ）in fresh fish.A standard addition method is used and the results are in good agreement with those obtained by ICP-MS technique. 计算机控制 恒电流溶出 汞 computer control constant current stripping mercury 1991-04-01 2021-04-01 4