DETERMINATION OF CHLOROPHENOLS AND CHLOROBENZENES IN LEACHATE BY HEADSPACE ANALYSIS

The application of headspace analysis for the determination of chlorop henols, chlorobenzenes and hexachlorocyclohexanes in water and leachat e samples is described. Detailed calibration tests were performed with one isomer of each chlorination degree in aqueous reference samples. Linearity was observed for all of the components investigated with the corresponding correlation coefficients >0,995. The method was applied to a highly contaminated leachate from a hazardous waste landfill. Tr iplicate measurements were performed, with relative standard deviation s <15%. Main components of the chlorobenzenes were mono- to trichlorob enzenes, detected at concentrations of 800 and 2000 ppb. Within the cl ass of chlorophenols, 2,4- and 2,5- dichlorophenol were found at maxim al concentrations of 150 ppm, whereas the tetrachlorophenols and penta chlorophenol were not detected at a detection limit of 1 ppb for 2,3,4 ,5- tetrachlorophenol. Among the hexacblorocyclohexane-isomers, gamma- and delta-HCH were the main components found at 3000 and 9000 ppb.