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Simultaneous separation of inorganic anions and cations using capillary electrophoresis with a movable contactless conductivity detector

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Unterholzner, V and Macka, M and Haddad, PR and Zemann, A (2002) Simultaneous separation of inorganic anions and cations using capillary electrophoresis with a movable contactless conductivity detector. Analyst, 127 (6). pp. 715-718. ISSN 0003-2654

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Abstract

A number of small inorganic anions and cations were separated after injection of the sample into both ends of a separation capillary. The ions were detected using a capacitively coupled contactless conductivity detector (CCCCD) which could be placed at various positions along the capillary length. Counter-directional migration of anions and cations occurs towards the detector, which is placed at an appropriate position along the capillary so that the migration order is determined by the respective effective separation capillary lengths for both anions and cations. As the CCCCD detector can be easily moved to any position along the capillary, virtually any effective separation length can be attained. Depending on the number of analytes in the sample, one can choose to obtain either electropherograms with inter-migrating zones of cations and anions or separations with distinct regions of anion and cation zones, respectively. A new term apparent separation selectivity is introduced to describe the manner in which the position of the detector can be varied in order to determine the final separation.

Item Type: Article
Journal or Publication Title: Analyst
Page Range: pp. 715-718
ISSN: 0003-2654
Identification Number - DOI: 10.1039/b202765h
Additional Information: Copyright 2002, Royal Society of Chemistry.
Date Deposited: 30 Apr 2008 12:23
Last Modified: 18 Nov 2014 03:38
URI: http://eprints.utas.edu.au/id/eprint/6205
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