Determination of acidity constants of acid-base indicators by second-derivative spectrophotometry

被引：32
|
作者：
Kara, D [1 ]
Alkan, M
机构：
[1] Balikesir Univ, Fac Art & Sci, Dept Chem, Balikesir 10100, Turkey
[2] Balikesir Univ, Necatibey Educ Fac, Dept Chem, Balikesir, Turkey
来源：
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2000年 / 56卷 / 14期
关键词：
dissociation constants; weak organic acids; second derivative spectrophotometry;
D O I：
10.1016/S1386-1425(00)00319-X
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
A method for calculation of acid-base dissociation constants of monoprotic weak organic acids whose acid and base species have overlapping spectra from absorptiometric and pH measurements is described. It has been shown that the second-derivative spectrophotometry can effectively be used for determining the dissociation constants, when dissociation constants obtained for methyl orange and bromothymol blue were compared with the values given in the literature. (C) 2000 Elsevier Science B.V. All rights reserved.
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页码：2753 / 2761
页数：9
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