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Optimization of pH for the separation of organic acids in capillary zone electrophoresis.

Authors
  • Smith, S C
  • Khaledi, M G
Type
Published Article
Journal
Analytical chemistry
Publication Date
Feb 01, 1993
Volume
65
Issue
3
Pages
193–198
Identifiers
PMID: 8447617
Source
Medline
License
Unknown

Abstract

The migration behavior and optimum separation of a set of substituted phenols is presented. A mathematical model that describes mobility in CZE in terms of fundamental constants of each solute (acid dissociation constant Ka, mobility of the dissociated acid microA-) and the pH of the buffer was used to predict the mobility of each solute as a function of pH. The resolution between each peak pair was calculated, and a window diagram of minimum resolution as a function of pH was employed in determining the optimum pH. A comparison of the predicted and actual electropherograms shows the usefulness of this technique.

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