Differential scanning potentiometry: surface charge development and apparent dissociation constants of natural humic acids

被引：24

作者：

Ceppi, SB

Velasco, MI

De Pauli, CP

机构：

[1] Univ Nacl Cordoba, Fac Ciencias Agropecuarias, Dept Recursos Nat, RA-5000 Cordoba, Argentina

[2] Univ Nacl Cordoba, Fac Ciencias Quim, Dept Fisioquim, INFIQC, RA-5000 Cordoba, Argentina

来源：

TALANTA | 1999年 / 50卷 / 05期

关键词：

humic acids; differential scanning potentiometry;

D O I：

10.1016/S0039-9140(99)00209-X

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Humic acids (HA) are the main components of soil organic matter which can form complexes with metal ions and other soil and/or water contaminants. Here, we focus on their acid-base properties. HA were extracted from two different soils (Tipic Ustifluvent and Entic Haplustoll) with different vegetation. In this study we use a simple method, differential scanning potentiometry (DSP), to determine HA buffer capacity distribution, apparent dissociation constant values and surface charge development. (C) 1999 Elsevier Science B.V. All rights reserved.

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页码：1057 / 1063

页数：7

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