On-line combination of aqueous-sample preparation and capillary gas chromatography. |
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Authors: | A J Louter J J Vreuls U A Brinkman |
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Institution: | Free University, Department of Analytical Chemistry and Applied Spectroscopy, HV Amsterdam, The Netherlands. |
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Abstract: | An overview is presented of methods currently in use to combine the preparation of aqueous samples on-line with capillary gas chromatography. Two approaches can be distinguished: heartcut-orientated reversed-phase liquid chromatography-gas chromatography (GC) and analyte-isolation-orientated analyte extraction-GC. These approaches either use techniques in which water is directly introduced onto the GC column, or an indirect approach in which water is eliminated, i.e., by solid-phase extraction, solid-phase microextraction or liquid-liquid extraction, prior to introduction of the analytes onto the GC column. The latter type of approach is much more successful and user friendly, and many applications have been reported. |
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