PRESENT TRENDS IN ANALYSIS OF ORGANIC-COM POUNDS IN WATER SAMPLES BY HIGH-RESOLUTION GAS-CHROMATOGRAPHY AND ITS COMBINATION WITH PRECONCENTRATION TECHNIQUES

A survey of modern methods for the analysis of water samples by capill ary GC is presented. The methods are classified as direct methods, whe re water sample is directly introduced into the GC system, and indirec t methods, where water is eliminated prior to transferring the analyte s to a column. The direct introduction is realized by on-column, loop- type, or programmed-temperature vaporized injection. Water elimination is based on liquid-liquid, solid-phase, and gas extractions.