A Potentiometric Titration Method for the Determination of Solubility Limits and pKa Values of Weak Organic Acids in Water.
A Potentiometric Titration Method for the Determination of Solubility Limits and pKa Values of Weak Organic Acids in Water.
复制标题
测定弱有机酸在水中的溶解度限度和pKa值的电位滴定法
DOI:
10.1021/acs.analchem.0c00247
复制
发表时间:
2020
影响因子:
7.4
通讯作者:
Cölfen
中科院分区:
文献类型:
--
作者:
Wiedenbeck;Gebauer;Cölfen
The determination of solubility limits of compounds in water is unprecise and relies on certain prerequisites such as UV–vis absorption activity. In this study, we designed an experimental approach based on potentiometric titrations to determine solubility limits of various organic compounds by exploiting their pH-active carboxylic acid groups. By applying the law of mass action, utilizing a double-dosing method ensuring a constant compound concentration, it is possible to determine the intrinsic solubility limits, which are independent of the pH value. The derived equations enable the precise and fast determination of intrinsic solubility limits of organic compounds in aqueous solutions within 2–4 h. Moreover, it is shown how the pKavalue can be determined based on titrations carried out at two different compound concentrations.
登录
查看更多内容
影响因子:
3.3
作者:
Loftsson, T;Hreinsdóttir, D
通讯作者:
Hreinsdóttir, D
影响因子:
29.4
作者:
Kellermeier, Matthias;Picker, Andreas;Gebauer, Denis
通讯作者:
Gebauer, Denis
DOI:
--
发表时间:
1987
期刊:
Journal of Pharmacy and Science
影响因子:
--
作者:
A. Fini;P. De Maria;A. Guarnieri;L. Varoli
通讯作者:
L. Varoli
影响因子:
1.8
作者:
Teng;Hong Shen;Chegnyue Zhu
通讯作者:
Chegnyue Zhu