【摘要】 用Ca -EDTA作Co的掩蔽剂 ,再以NaOH溶液解蔽Zn -EDTA络合物 ,示波极谱法测定含钴试料中Zn。方法用于分析质量分数w(Zn)为 0 .1 %～ 3%的矿石样品 ,结果与王水溶解 -原子吸收法测定结果相符。对样品进行精密度检验 ,相对标准偏差 (RSD ,n =5 ) <1 0 %。更多还原

【Abstract】 A method for the determination of zinc in cobaltiferous materials by polarography is described in this paper .Cobalt is first masked by Ca EDTA in sample solution and then the formed complex of Zn EDTA is demasked by NaOH solution. The method has been applied to the determination of Zn with w (Zn)=0.1%～0.3%. The results are in agreement with those provided by aqua regia sample digestion AAS determination with precision of <10% RSD ( n =5).更多还原