Abstract:

By means of acid-base potentiometric titration and the BEST computer program developed by A. E. Martell, et al, the dissociation constants of aminotrimethylenephosphonic acid (ATMP)and the stability constants of its complexes with two divalent cations (Ca²⁺,Mg²⁺)have been determined. According to the experimental and computing results, the distribution curves of the coordinating species in aqueous solution at different pH are given out. The possible effect of ATMP on the inhibition of the above scale forming divalent cations is discussed.

Key words: acid-base potentiometeric titration, aminotrimethylenephosphonic acid (ATMP), coordination chemistry, calciumion, magnesium ion

摘要：

采用电位滴定方法，运用先进的配位常数计算程序，通过恰当配位化学模型的建立，研究了水溶液中氨基三亚甲基膦酸(ATMP)自身的解离以及与Ca²⁺、Mg²⁺离子间的配位化学作用，测定了相应的解离常数和配合物稳定常数，并得到了各配合物物种在不同pH条件下的形态分布，从溶液配位化学的角度对ATMP的阻垢作用机理进行了讨论．

关键词: 电位滴定, 氨基三亚甲基膦酸, 配位化学, 钙离子, 镁离子

CLC Number: 

• TQ085+.412