Catalytic Wave of Cobalt and its Analytical Application in Rapid Determination of Trace Cobalt in Complex Zinc Electrolyte Solution
来源期刊：中南大学学报(英文版)2000年第2期
论文作者：ZHANG Ming-hao ZHOU Chun-shan LIU Qian-hui
文章页码：84 - 87
Key words：catalytic wave; diacetyldioxime; potassium pyrophosphate; determination; cobalt
Abstract: A polarographic catalytic wave of cobalt in the substrate solution (pH=8.5) of diacetyldioxime-potassium pyrophosphate-ammonium chloride was studied and a newmethod for rapid determination of trace cobalt in complex zinc electrolyte solution was developed. The results showthat there is a very sensitive catalytic wave of cobalt at-1.23 V. At least three hundred thousand fold Zn2+does not affect the determination of cobalt. The method is easy to operate and rapid, and when the signal-to-noise rate equals 2, the detection limit is 6×10-9mol·L-1. A good linear relationship exists between the concentration of cobalt within 0.001~3.0μg·mL-1 and the peak current. The method has successfully been used in the determination of trace cobalt in com- plex solution of the workshop for electrolyzing zinc.
