Volatile and semivolatile organo-halogen trace analysis in surface water by direct aqueous injection GC-ECD.
A procedure for simultaneous determination of volatile and semivolatile chloroorganic compounds (from trichloromethane to di- and trichlorobenzenes to hexachlorobutadiene) in aqueous samples was developed. The procedure is based on a DAI-GC-ECD technique widely used for trihalomethanes determination in drinking water. The DAI technique application could have been extended to semivolatile chloroorganic compounds by using a Rtx-624 (60 m x 0.32 mm I.D., df 1.8 microns (6% cyanopropyl, 94% dimethyl polysiloxane). Precision (R.S.D.) and detection limits of the DAI-GC-ECD procedure with respect to 12 volatile and semivolatile chloroorganics were determined. Relative standard deviations (R.S.D.) were lower than 22% and the detection limits (concentration equivalent to a peak height three times the baseline noise) range from 0.02 microgram L-1 for trichloroethene and tetrachloroethene to 0.25 microgram L-1 for hexachlorobutadiene to 1.6 micrograms L-1 for 1,2-dichlorobenzene. The method was successfully used to determine chloroorganic pollutants in river water.
Wolska
L
L
Department of Analytical Chemistry, Chemical Faculty, Technical University of Gdańsk, Poland.
Olszewska
C
C
Turska
M
M
Zygmunt
B
B
Namieśnik
J
J
D002849:Chromatography, Gas; D006843:Hydrocarbons, Chlorinated / Q000032:analysis*; D014835:Volatilization; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014881:Water Supply / Q000032:analysis*
D006843:Hydrocarbons, Chlorinated; D014874:Water Pollutants, Chemical