DETERMINATION OF VOLATILE CHLORINATED HYDROCARBONS AND TRICHLOROACETIC-ACID IN CONIFER NEEDLES BY HEADSPACE GAS-CHROMATOGRAPHY

Concentrations of selected volatile chlorinated hydrocarbons (VCH) wer e determined in rain water and conifer needles by headspace gas-chroma tography (HSGC) for the estimation of deposition and accumulation in t he environment. Trichloroacetic acid (TCA), one of.the main degradatio n products of VCH, was analysed as well. For this purpose decarboxylat ion of TCA to trichloromethane was used. A modified standard addition method (SA) for calibration with conifer needles is documented to show its capability as a tool for calibration in solid matrices in general . Results of current investigations are presented.