论文部分内容阅读
A polarographic catalytic wave of cobalt in the substrate solution (pH=8.5) of diacetyldioxime potassium pyrophosphate ammonium chloride was studied and a new method for rapid determination of trace cobalt in complex zinc electrolyte solution was developed. The results show that there is a very sensitive catalytic wave of cobalt at 1.23 V. At least three hundred thousand fold Zn 2+ 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 -9 mol·L -1 . A good linear relationship exists between the concentration of cobalt within 0.001 ～3.0 μg·mL -1 and the peak current. The method has successfully been used in the determination of trace cobalt in complex solution of the workshop for electrolyzing zinc.
A polarographic catalytic wave of cobalt in the substrate solution (pH = 8.5) of diacetyldioxime potassium pyrophosphate ammonium chloride was studied and a new method for rapid determination of trace cobalt in complex zinc electrolyte solution was developed. The results show that there is a very sensitive catalytic wave of cobalt at 1.23 V. At least three thousand thousand fold Zn 2+ 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 -9 mol·L -1. A good linear relationship exists between the concentration of cobalt within 0.001-3.0 μg · mL -1 and the peak current. The method has successfully been used in the determination of trace cobalt in complex solution of the workshop for electrolyzing zinc.