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 Dunges. 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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