Abstract
A fast sample preparation method for the trace determination of some exploxives, by-products and degradation compounds in water by capillary gas chromatography is described. It is based on multiple extractions of the water sample with sub-milliliter amounts of solvent and subsequent concentration of the unified extracts by reducing its volume to a few microliters according to Dünges. The most suitable solvent was methyl-tert.-butylether. With electron caption detection and an aqueous sample volume of 25 to 100 ml, the determination level is in the pg/ml range.
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Received: 3 May 1996 / Revised: 28 June 1996 / Accepted: 5 July 1996
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Welsch, T., Block, H. Separation and enrichment of traces of explosives and their by-products from water by multiple micro liquid extraction for their determination by capillary gas chromatography. Fresenius J Anal Chem 357, 904–908 (1997). https://doi.org/10.1007/s002160050272
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DOI: https://doi.org/10.1007/s002160050272