Abstract
The determination of trace analytes in some types of samples by capillary electrophoresis (CE) requires their prior extraction from the sample matrix and preconcentration. The preconcentration step is the bottleneck of many analytical processes, which should ideally involve as few operations as possible in order to minimize potential errors and shorten analysis times. There is a growing search for more environmental friendly approaches capable of using smaller amounts of solvents and sample sizes. Although solid phase extraction (SPE) continues to be the most widely used concentration technique, some cleanup/ concentration methodologies involving the use of membranes, electrophoretic preconcentration, chromogenic reagents, microdialysis (MD), solid phase microextraction (SPME), hollow fibres (HF), supercritical fluid extraction (SFE), cloud point extraction (CPE) and stir bar sorptive extraction (SBSE) have proved effective alternatives for preconcentration purposes. This paper reviews available preconcentration techniques for use in CE analysis (mainly with UV-Vis detection) and supplements the information contained in previously published reviews about this emerging field of analysis.
Keywords: Capillary electrophoresis, Preconcentration, Sensitivity
Current Analytical Chemistry
Title: The More and Less Common Approaches to Enhancing Sensitivity in Capillary Electrophoresis
Volume: 6 Issue: 2
Author(s): S. Almeda, L. Arce and M. Valcarcel
Affiliation:
Keywords: Capillary electrophoresis, Preconcentration, Sensitivity
Abstract: The determination of trace analytes in some types of samples by capillary electrophoresis (CE) requires their prior extraction from the sample matrix and preconcentration. The preconcentration step is the bottleneck of many analytical processes, which should ideally involve as few operations as possible in order to minimize potential errors and shorten analysis times. There is a growing search for more environmental friendly approaches capable of using smaller amounts of solvents and sample sizes. Although solid phase extraction (SPE) continues to be the most widely used concentration technique, some cleanup/ concentration methodologies involving the use of membranes, electrophoretic preconcentration, chromogenic reagents, microdialysis (MD), solid phase microextraction (SPME), hollow fibres (HF), supercritical fluid extraction (SFE), cloud point extraction (CPE) and stir bar sorptive extraction (SBSE) have proved effective alternatives for preconcentration purposes. This paper reviews available preconcentration techniques for use in CE analysis (mainly with UV-Vis detection) and supplements the information contained in previously published reviews about this emerging field of analysis.
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Almeda S., Arce L. and Valcarcel M., The More and Less Common Approaches to Enhancing Sensitivity in Capillary Electrophoresis, Current Analytical Chemistry 2010; 6 (2) . https://dx.doi.org/10.2174/157341110790945508
DOI https://dx.doi.org/10.2174/157341110790945508 |
Print ISSN 1573-4110 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-6727 |
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