伪极谱法测定配合物组成和稳定常数的研究——低金属浓度的镉～硫酸盐、镉～碘化物、铅～氟化物、镉～氟化物水溶液体系

Study on the Determination of the Compositions and Stability Constants of Metal Complex with Pseudo-Polarography Technique Suitable for Very Low Concentration of Metal——Cd (Ⅱ) ～SO_4^(2-), Cd (Ⅱ)～I^-, Pb (Ⅱ)～F^- and Cd (Ⅱ)～F^- acqueous sy

本文采用伪极谱法测定了镉～硅酸盐、镉～碘化物、铅～氟化物、镉～氟化物水溶液体系配合物组成和稳定常数。金属离子浓度为[cd^(2+)]=1.8×10^(-7)mol/dm^3,[Pb^(2+)]一 2.0×10(-7)mol/dm^3,对适用于悬汞电极配合物体系的可逆伪极谱方程作了理论推导。

In this paper, the study on the determination of the compositions and the stability constants of ac- queous cadmium sulfate, acqueous cadmium iodide, acqueous lead fluoride and acqueous cadmium fluo- ride systems with Pseudo-polarogrphy technique is reported. The concentration of metal ion is 1, 8× 10^(-7)mol/dm^3 for ed(Ⅱ) and 2. 0×10^(-7)mol/dm^3 for Pb(Ⅱ), The theoretical derivation of reversible pseado-polarography equation of complex system for HMDE is also presented.