Derivative analysis of potentiometric titration data to obtain protonation constants

被引：22

作者：

Chen, JF ^{[1
]}

Xia, YX ^{[1
]}

Choppin, GR ^{[1
]}

机构：

[1] FLORIDA STATE UNIV,DEPT CHEM,TALLAHASSEE,FL 32306

来源：

ANALYTICAL CHEMISTRY | 1996年 / 68卷 / 22期

关键词：

D O I：

10.1021/ac960138t

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A methodology is described to calibrate glass electrodes and to analyze potentiometric titration data to calculate protonation constants, The analysis uses the variation of dV/dpH with titrant addition in terms of two physical parameters which involve the concentrations of H+, OH-, and H(m)A. The data for titration of acetic acid and 8-hydroxyquinoline in 0.10-5.0 m NaCl media ape analyzed by this method to obtain the stoichiometric protonation constants of the acids, the ionization constants of water, and the parameters s and b in the pH electrode calibration equation, pcH = spH(m) + b, where pcH = -log [H+], and pH(m) is the pH meter reading.

引用

页码：3973 / 3978

页数：6

共 31 条

[1] ACCURATE MEASUREMENTS OF CONCENTRATION OF HYDROGEN-IONS WITH A GLASS-ELECTRODE - CALIBRATIONS USING PRIDEAUX AND OTHER UNIVERSAL BUFFER SOLUTIONS AND A COMPUTER-CONTROLLED AUTOMATIC TITRATOR [J].