Title
Potentiometric detection for capillary electrophoresis: Determination of organic acids Potentiometric detection for capillary electrophoresis: Determination of organic acids
Author
Faculty/Department
Faculty of Sciences. Chemistry
Publication type
article
Publication
Washington, D.C. ,
Subject
Chemistry
Source (journal)
Analytical chemistry. - Washington, D.C.
Volume/pages
68(1996) :24 , p. 4441-4445
ISSN
0003-2700
ISI
A1996VX78600022
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
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.
E-info
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:A1996VX78600022&DestLinkType=RelatedRecords&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:A1996VX78600022&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:A1996VX78600022&DestLinkType=CitingArticles&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848
Handle