Mv. Russo, Diol Sep-Pak cartridges for enrichment of polychlorobiphenyls and chlorinated pesticides from water samples; Determination by GC-ECD, CHROMATOGR, 52(1-2), 2000, pp. 93-98
Gas chromatography of polychlorinated biphenyls and chlorinated pesticides
in water samples has been performed after adsorption from a 20 - 200-mL sam
ple on to a cartridge containing 100 mg diol-bonded porous silica. The PCBs
are desorbed with 500 mu l ethyl acetate, which is concentrated and analys
ed by gas chromatography with electron-capture detection (GC-ECD).
The average recovery of 0.1 ng mL(-1) PCB congeners from distilled water an
d from Aniene river water is greater than or equal to 95% (standard deviati
on less than or equal to 2.8). Average recoveries of 25 ng mL(-1) Aroclor 1
254 from distilled water and from Aniene river water were, respectively 94.
4% and 92.5% (standard deviation 5.8).
In the separation of PCB congeners from the chlorinated pesticides only the
aldrin (40%) was eluted with the PCBs from the diet Sep-Pak cartridge by a
queous methanol. The method described is simple and reproducible.