A simple method for the determination of the acidity parameters of ion exchangers

被引：13
|
作者：
Soldatov, VS
机构：
[1] Byelarussian Acad Sci, Inst Phys Organ Chem, Minsk 220072, BELARUS
[2] Tech Univ Lublin, PL-20618 Lublin, Poland
来源：
REACTIVE & FUNCTIONAL POLYMERS | 2000年 / 46卷 / 01期
关键词：
ion exchangers; potentiometric titration; acid-base properties;
D O I：
10.1016/S1381-5148(00)00041-9
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
A simple method for calculating acidity parameters, suggested in a previous publication (React. Funct. Polym. 38 (1998) 73), as well as constants for the modified Henderson-Hasselbach equation, is described. It follows from analysis of the shape of potentiometric titration curves of ion exchangers that along with the vertical inflection at the equivalence point, they have a horizontal inflection at half neutralization. The pH value and the tangent of the titration curve at that point are simply related to the acidity parameters of resins. The derived equations allow ready determination directly from the titration curve. (C) 2000 Elsevier Science B.V. All rights reserved.
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页码：55 / 58
页数：4
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