用于示踪分析的固体汞合金电极线性扫描伏安法测痕量钼  

Determination of molybdenum (Ⅵ) by voltammetric method using solid amalgam electrode in ground water tracer analysis

作　　者：邓振平[1] 周小红[2] 杜亚琳[3] 李建平[3] 

机构地区：[1]中国地质大学,北京100083 [2]中国地质科学院岩溶地质研究所,桂林541004 [3]桂林工学院材料与化学工程系,桂林541004

出　　处：《分析试验室》2007年第12期44-47,共4页Chinese Journal of Analysis Laboratory

基　　金：广西高校百名中青年学科带头人基金([2005]64)项目资助

摘　　要：研究了可用于示踪分析测定痕量钼的固体银汞合金电极催化伏安法。在H2SO4-苯羟乙酸-氯酸钾体系中,采用该电极于-0.165 V（vs.SCE）处出现灵敏的还原峰,Mo的质量浓度在0-200 ng/mL范围内与峰高呈良好线性关系,检出限为0.42 ng/mL。该方法操作简便、快速,同时又可避免传统汞电极使用中带来的不便和毒性。对实际水样进行了测定。A sensitive tracer analysis method for the determination of trace molybdenum in ground water using solid silver amalgam electrode by linear sweep catalytic voltammetry is proposed. A sensitive reduction peak was obtained at - 0.16 V （ vs. SCE） in sulphuric acid solution in the presence of phenylhydroxyacetic acid and potassium chlorate. The peak current is linear with the concentration of molybdenum in the range of 0 - 200 ng/mL. The detection limit is 0.42 ng/mL. The method is simple, rapid, convenient and mercury free. It has been applied to determination of the trace level of molybdenum in ground water samples with satisfactory results.

关 键 词：示踪分析 固体汞电极 钼 催化伏安法 

分 类 号：O557.1[理学—热学与物质分子运动论]