催化电位法测定痕量铜

Catalytic Potentiometric Determination of Trace Amount of Copper (Ⅱ)

本文提出固定时间标准校正比较法,用碘离子选择性电极为指示电极研究了Cu^(2+)-S_(2)O82--I-反应体系催化测定痕量Cu^(2+)的最佳条件并应用于实际分析。

This paper describes the optimum conditions for determination of Cu ( Ⅱ) which catalyzes the reaction between peroxidisulphate and iodide that monitored by iodide selective electrode. A new method of standard calibration and comparison was suggested simultaneously. At a fixed-time procedure, the variation of poten-tial(ΔmV) is linearly related to Cu ( Ⅱ ) Cone, in the range of 2.5 to 25 ng/ml.