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On-line simultaneous and rapid separation of anions and cations from a single sample using dual-capillary sequential injection-capillary electrophoresis

Citation

Gaudry, AJ and Guijt, RM and Macka, M and Hutchinson, JP and Johns, C and Hilder, EF and Dicinoski, GW and Nesterenko, PN and Haddad, PR and Breadmore, MC, On-line simultaneous and rapid separation of anions and cations from a single sample using dual-capillary sequential injection-capillary electrophoresis, Analytica Chimica Acta, 781 pp. 80-87. ISSN 0003-2670 (2013) [Refereed Article]

Copyright Statement

Copyright 2013 Elsevier B.V.

DOI: doi:10.1016/j.aca.2013.03.027

Abstract

A novel capillary electrophoresis (CE) approach has been developed for the simultaneous rapid separation and identification of common environmental inorganic anions and cations from a single sample injection. The method utilised a sequential injection-capillary electrophoresis instrument (SI-CE) with capacitively-coupled contactless conductivity detection (C4D) constructed in-house from commercial-off-the-shelf components. Oppositely charged analytes from a single sample plug were simultaneously injected electrokinetically onto two separate capillaries for independent separation and detection. Injection was automated and may occur from a syringe or be directly coupled to an external source in a continuous manner. Software control enabled high sample throughput (17 runs per hour for the target analyte set) and the inclusion of an isolation valve allowed the separation capillaries to be flushed, increasing throughput by removing slow migrating species as well as improving repeatability. Various environmental and industrial samples (subjected only to filtering) were analysed in the laboratory with a 3min analysis time which allowed the separation of 23 inorganic and small organic anions and cations. Finally, the system was applied to an extended automated analysis of Hobart Southern Water tap water for a period of 48h. The overall repeatability of the migration times of a 14 analyte standard sample was less than 0.74% under laboratory conditions. LODs ranged from 5 to 61μgL-1. The combination of automation, high confidence of peak identification, and low limits of detection make this a useful system for the simultaneous identification of a range of common inorganic anions and cations for discrete or continuous monitoring applications.

Item Details

Item Type:Refereed Article
Keywords:simultaneous anion and cation separation, capillary electrophoresis, sequential injection
Research Division:Chemical Sciences
Research Group:Analytical Chemistry
Research Field:Separation Science
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
Author:Gaudry, AJ (Mr Adam Gaudry)
Author:Guijt, RM (Dr Rosanne Guijt)
Author:Macka, M (Professor Mirek Macka)
Author:Hutchinson, JP (Dr Joseph Hutchinson)
Author:Johns, C (Dr Cameron Johns)
Author:Hilder, EF (Professor Emily Hilder)
Author:Dicinoski, GW (Associate Professor Gregory Dicinoski)
Author:Nesterenko, PN (Professor Pavel Nesterenko)
Author:Haddad, PR (Professor Paul Haddad)
Author:Breadmore, MC (Professor Michael Breadmore)
ID Code:88247
Year Published:2013
Web of Science® Times Cited:37
Deposited By:Austn Centre for Research in Separation Science
Deposited On:2014-01-22
Last Modified:2014-08-11
Downloads:0

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