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Title: Derivative analysis of potentiometric titration data to obtain protonation constants

Abstract

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{sup +}, OH{sup -}, and H{sub m}A. The data for titration of acetic acid and 8-hydroxyquinoline in 0.10-5.0 m NaCl media are 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{sub m} + b, where pcH = -log[H{sup +}], pH{sub m} is the pH meter reading. 31 refs., 3 figs., 6 tabs.

Authors:
; ;  [1]
  1. Florida State Univ., Tallahassee, FL (United States)
Publication Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
OSTI Identifier:
420700
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Journal Article
Journal Name:
Analytical Chemistry (Washington)
Additional Journal Information:
Journal Volume: 68; Journal Issue: 22; Other Information: PBD: 15 Nov 1996
Country of Publication:
United States
Language:
English
Subject:
40 CHEMISTRY; ELECTRODES; CALIBRATION; EXPERIMENTAL DATA; TITRATION; CHEMICAL ANALYSIS; POTENTIOMETRY; GLASS; PH VALUE; MEASURING METHODS; CALCULATION METHODS; IONIC POTENTIAL; IONIZATION

Citation Formats

Chen, J F, Xia, Y X, and Choppin, G R. Derivative analysis of potentiometric titration data to obtain protonation constants. United States: N. p., 1996. Web. doi:10.1021/ac960138t.
Chen, J F, Xia, Y X, & Choppin, G R. Derivative analysis of potentiometric titration data to obtain protonation constants. United States. https://doi.org/10.1021/ac960138t
Chen, J F, Xia, Y X, and Choppin, G R. 1996. "Derivative analysis of potentiometric titration data to obtain protonation constants". United States. https://doi.org/10.1021/ac960138t.
@article{osti_420700,
title = {Derivative analysis of potentiometric titration data to obtain protonation constants},
author = {Chen, J F and Xia, Y X and Choppin, G R},
abstractNote = {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{sup +}, OH{sup -}, and H{sub m}A. The data for titration of acetic acid and 8-hydroxyquinoline in 0.10-5.0 m NaCl media are 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{sub m} + b, where pcH = -log[H{sup +}], pH{sub m} is the pH meter reading. 31 refs., 3 figs., 6 tabs.},
doi = {10.1021/ac960138t},
url = {https://www.osti.gov/biblio/420700}, journal = {Analytical Chemistry (Washington)},
number = 22,
volume = 68,
place = {United States},
year = {Fri Nov 15 00:00:00 EST 1996},
month = {Fri Nov 15 00:00:00 EST 1996}
}