MULTIDETERMINATION OF PCBS AND PESTICIDES BY USE OF A DUAL GC COLUMN-DUAL DETECTOR SYSTEM

A new gas chromatographic method involving the use of two capillary columns, a switching valve and electron capture-nitrogen-phosphorus detection, and allowing up to four retention characteristics per component to be obtained is reported. The proposed method was applied to the analysis for 123 compounds (13 PCBs and 110 pesticides), the determination limits and optimal measuring ranges of which are reported. The performance of the method was checked by analysis of certified standards and spiked samples, and was applied to the determination of the analytes in various water samples.