Publication
Title
Potentiometric detection for capillary electrophoresis: Determination of organic acids
Author
Abstract
A potentiometric detector was developed for CE and applied to the determination of aliphatic carboxylic acids (up to C-10). The electrodes used were of the ''coated wire'' type. Insulated Cu wires (from 100 to 250 mu m diameter), with only the tip of the wire exposed, were directly coated with ''liquid membrane'' phases. A quaternary ammonium salt and a lipophilic macrocyclic pentaamine were used as carrier molecules. The electrodes were positioned at the end of the capillary (''wall-jet'' type of construction). The best compromise between separation and detection characteristics was obtained with a HEPES buffer system. Detection limits of 100 fmol were obtained (injection by electromigration). Calibration curves were linear in the range of 0-25 pmol injected. The behavior of the detection system is discussed theoretically.
Language
English
Source (journal)
Analytical chemistry. - Washington, D.C., 1948, currens
Publication
Washington, D.C. : 1996
ISSN
0003-2700 [print]
5206-882X [online]
Volume/pages
68:24(1996), p. 4441-4445
ISI
A1996VX78600022
Full text (Publisher's DOI)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 19.07.2012
Last edited 08.08.2017
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