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Water SA
versão On-line ISSN 1816-7950
versão impressa ISSN 0378-4738
Water SA vol.34 no.3 Pretoria Mar. 2008
Sample preparation using liquid membrane extraction techniques
Titus MsagatiI; Luke ChimukaII; Ewa CukrowskaII
IUniversity of KwaZulu-Natal, School of Chemistry, Private Bag X54001 Westville Campus, Durban 4000, South Africa
IISchool of Chemistry, University of the Witwatersrand, P/Bag 3, WITS 2050, Jorissen Street, Braamfontein, Johannesburg, South Africa
ABSTRACT
A brief review is given of membrane extraction techniques that are seen as suitable for the extraction of various chemicals in water samples. Membrane-based extraction methods have now gained popularity as methods of choice in the extraction of both ionisable and non-ionisable molecules from different samples. The main attractive features for these techniques include the use of minimal organic solvents, high selectivity and clean-up efficiency, with high enrichment factors. In most cases the overall cost involved is low due to the simplicity of the techniques which normally involve relatively fewer steps and handling procedures as compared to many other sample-preparation techniques. The various forms and the configurations of membrane-based techniques are another attractive feature which allows the possibility of hyphenation with separation instruments such as gas/liquid chromatographs and even capillary electrophoresis.
Keywords: liquid membrane extraction techniques, sample preparation, water monitoring, organic and inorganic compounds
"Full text available in PDF"
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Correspondence:
+2711 717-6703, +27 724978041
Fax: +2711 717-6749
E-mail: luke.chimuka@wits.ac.za or luke_chimuka@hotmail.com
Received 12 December 2007;
Accepted in revised form 20 March 2008.