铜的交流示波极谱滴定

THE A. C. OSCILLOPOLAROGRAPHIC TITRATION OF COPPER

本文提出了在pH6的HAc-NH_4Ac缓冲溶液中,用三乙烯四胺滴定Cu,以Cu^(2+)在交流示波极谱dE/dt-E曲线上切口消失直接指示终点。Cu量分析范围为0.9—18.00mg。方法回收率为99.10—100.85%。对于含铜0.xx—xx.xx%的试样分析10次相对标准偏差为0.21—1.13%。

A simple method is described for A.C. oscillopolarographic titration of Cu with TRIEN. In a buffer solution (HAc-NH_4Ac) of pH6. a sharp Cu^(2+) incision is given on dE/dt vs E curves and copper (0.90—18.00mg) can be titrated directly with TRIEN. The recovery of Cu is 99. 10—100.85%. The relative standard deviation for the samples containing 0. xx—xx. xx% Cu is 0.21—1.13%(n=10).