Abstract
AbstractThe ASPEC (Automatic Sample Preparation with Extraction Columns) system has been coupled on‐line to capillary GC‐ECD by means of a loop‐type interface equipped with a solvent vapour exit. Both ASPEC and GC conditions have been optimized leading to an effective clean‐up of the extracts analyzed.By means of solid‐phase extraction cartridges filled with silica, it has been possible to analyze concentrated surface water extracts for a group of 18 electron‐capturing compounds present in the water at ppt levels. ASPEC‐GC has also been applied to the determination of synthetic pyrethroids at ppt levels in surface water.The complete analytical procedure is greatly facilitated by automation and miniaturization. Miniaturization results in a considerable decrease in the sample volume required. The potential of the method for the analysis of other pesticides is estimated.
Published Version
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