Trace determination of organic compounds in water by direct enrichment in multichannel thick film silicone rubber traps with capillary gas chromatography

The application of Multichannel Silicone Rubber Traps for the direct analys is of organic compounds in water was studied. The optimum collection flow r ate for a 10 mL sample was found bo be ca, 150 mu L.min(-1). The effect of methanol on the retention power of the trap was evaluated. The addition of a methanol fraction of up to 40% to the water standards did not show any lo ss in collection efficiency, It was shown that the extraction of organic co mpounds from water with the multichannel trap is uncomplicated, i.e, methan ol is not required to achieve accurate analyses, concentration of the sampl e onto the trap is by gravity flow, and excess water remaining in the multi channel trap after water extraction is removed by centrifugation, With the use of the multichannel silicone rubber trap a wide boiling point range of compounds were analyzed from aqueous samples at levels of 1-4 mu g.L-1.