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
Cölfen
中科院分区:
化学1区
文献类型:
--
作者:
Wiedenbeck;Gebauer;Cölfen

文献摘要

参考文献

被引文献

相似文献

测定化合物在水中的溶解度极限是不精确的,并且依赖于某些先决条件,如紫外-可见吸收活性。在这项研究中,我们设计了一种基于电位滴定的实验方法,通过利用其ph活性羧基来确定各种有机化合物的溶解度极限。通过应用质量作用定律,利用双重给药方法确保恒定的化合物浓度,可以确定与pH值无关的固有溶解度极限。导出的方程能够在2-4小时内精确快速地测定有机化合物在水溶液中的固有溶解度极限。此外,它还显示了如何根据在两种不同化合物浓度下进行的滴定来确定pkg值。
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.
DOI: 10.1208/pt070104
发表时间: 2006-01-01
期刊: AAPS PHARMSCITECH
影响因子: 3.3
作者:
Loftsson, T;Hreinsdóttir, D
通讯作者: Hreinsdóttir, D
DOI: 10.1002/adma.201303643
发表时间: 2014-02-05
期刊: ADVANCED MATERIALS
影响因子: 29.4
作者:
Kellermeier, Matthias;Picker, Andreas;Gebauer, Denis
通讯作者: Gebauer, Denis
通过电位滴定法测定二甲亚砜水溶液中的难溶性药物的酸度常数。
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
使用多波长 UV 读板仪进行高通量溶解度测定方法的评估。
DOI: --
发表时间: 2002
影响因子: 1.8
作者:
Teng;Hong Shen;Chegnyue Zhu
通讯作者: Chegnyue Zhu