Determination of volatile organohalogen compounds and petroleum hydrocarbons in rain water and snow by means of gas chromatography

Volatile organic compounds in precipitation (rain, snow) samples were colle cted and analyzed from December 1995 to May 1997, at five sampling sites si tuated in the city of Gdansk (Poland). Precipitation gathered for one month were combined as one individual sample. Volatile organohalogen compounds a nd petroleum hydrocarbons were determined in samples. Analyses were carried out by means of direct aqueous injection-gas chromatography (DAI-GC) or pu rge and trap (PT) technique after isolation and enrichment of analytes. As a result of conducted studies the presence of substances mentioned above in precipitation was ascertained. Different levels of concentrations were con nected with the sampling place and the sampling time.