从一道习题谈络合掩蔽下共存离子效应系数的计算

Evaluation of the Side Reaction Coefficient of the Coexistence Ion in the Presence of Complexation Masking Agent from an Exercise

本文从一道习题出发,讨论了络合掩蔽剂存在下,混合金属离子M和N在络合滴定过程中共存离子效应系数的计算,提出用混合离子分别滴定判别式,作为在计算过程中用计量点时共存离子N的分析浓度,代替其平衡浓度[N′]的判别条件,并对不满足条件时准确的[N′]值给出了算法。

The side reaction coefficient of the coexistence ion in the presence of complexation masking a- gent was evaluated from an exercise in the present paper. The sectional titration discriminant of the mixed metal ions M and N was proposed to act as the discriminant of substitution the analytical concen- tration of coexistence ion N for its equilibrium concentration [NI] at the stoichiometric point, and the ac- curate equilibrium concentration ENr] was calculated when the condition was not satisfied.