Development of a filtration and titration method for the determination of the acidity of humic acids.

被引：17

作者：

Prado, AGS ^{[1
]}

Souza, SM ^{[1
]}

da Silva, WTL ^{[1
]}

Rezende, MOD ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil

来源：

QUIMICA NOVA | 1999年 / 22卷 / 06期

关键词：

humic acids; acidity; titration method;

D O I：

10.1590/S0100-40421999000600018

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The acidity determinations method of humic acids (HA) content was developed by Schnitzer and Gupta and is a very well known procedure. Nevertheless, care is necessary to prevent measure errors due to non-controlled BaCO3 production, during the filtration and titration of HA total acidity, To overcome this problem, we developed in our laboratory a simple filtration and titration system for the determination of HA acidity under inert atmosphere. This system enables a better reproducibility and accuracy of total, carboxylic and phenolic acidity measures than those by Schnitzer and Gupta method.

引用

页码：894 / 896

页数：3

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