MECHANISTIC STUDIES OF CHELATING RESINS USING 2-PHASE POTENTIOMETRY

被引：10

作者：

JARVIS, NV ^{[1
]}

WAGENER, JM ^{[1
]}

机构：

[1] ATOM ENERGY CORP S AFRICA LTD,DEPT PROC TECHNOL,POB 582,PRETORIA 0001,SOUTH AFRICA

来源：

TALANTA | 1994年 / 41卷 / 05期

关键词：

D O I：

10.1016/0039-9140(93)E0040-K

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The elucidation of metal ion binding mechanisms with chelating resins by treating the resin as a collection of monomeric units is an established approach. In this paper, this approach is used to treat data obtained from two-phase potentiometric titrations by the programme ESTA. Apparent protonation and formation constants could be calculated. From these, species distribution plots could be obtained. These, in turn, allowed the calculation of the more familiar distribution ratios. The method was tested on Fe(III) and Nd(III) bonding with the iminodiacetate functionalized resin, Chelex(dagger) 100; and Ca(II) bonding to the aminomethylphosphonate functionalized resin, Purolite S940. Good results were obtained indicating the applicability of this method. Comparisons with the literature are made.

引用

页码：747 / 754

页数：8

共 9 条

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