STUDY OF THE POLYELECTROLYTE PROPERTIES OF HUMIC ACIDS BY CONDUCTIMETRIC TITRATION

被引：31

作者：

VANDENHOOP, MAGT ^{[1
]}

VANLEEUWEN, HP ^{[1
]}

CLEVEN, RFMJ ^{[1
]}

机构：

[1] NATL INST PUBL HLTH & ENVIRONM PROTECT,INORGAN CHEM LAB,3720 BA BILTHOVEN,NETHERLANDS

来源：

ANALYTICA CHIMICA ACTA | 1990年 / 232卷 / 01期

关键词：

D O I：

10.1016/S0003-2670(00)81230-1

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Solutions of humic acids were titrated with potassium, sodium, lithium, calcium and barium hydroxide using conductimetry. A marked difference was observed in the shape of the curves for alkali metal hydroxides and those for alkaline earth metal hydroxides. From a careful analysis of the measured conductivities, it appears that monovalent cations are hardly bound by the humate polyion, hwereas divalent counter ions show an extremely strong interaction. The latter feature may be fruitfully utilized in quantitative analysis. The conductance properties of humic acids are basically different from those of a linear polyelectrolyte such as polymethacrylate. © 1990.

引用

页码：141 / 148

页数：8

共 29 条

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