关于过量金属离子中和曲线法计算的改进意见

来源期刊：中南大学学报(自然科学版)1989年第6期

论文作者：关鲁雄 陈超球 夏鹏飞

文章页码：666 - 670

关键词：络合物化学； 平衡常数； 电位滴定/正己烷基亚氨二乙酸

Key words：coordinate chemistry； equilibrium constant； potentiometric titration/n-hexyl iminodiacetic acid

摘    要：G·Schwarzenbach等人在他们提出的过量金属离子中和曲线法中引入了表观离解常数(K_t、K_f、K_s)。笔者认为该常数包含着实际并不为常数的游离金属离子浓度项([M]),因而概念不够严密,亦使计算复杂化。本文提出了该实验的新的数据处理方法。其处理结果与文献方法一致而物理意义更为明确。

Abstract: G. Schwarzenbac et al. used superficial dissociation constants in pH-Titration method with the metallic ion in excess proposed by themselves. The present authors think that these constants comprise free metallic ion concentration which is not a constant in fact and thus do not have clear physical meaning and make calculation complicated. A new data-treatment method for the experiment of pH-Titration method with the metallic ion in excess is presented in this paper. The result is in agreement with that of literature and the physical meaning is clear.