| A liquid liquid extraction gas chromatography method by different solvents for determination of nitrobenzene compounds in drinking water was established. The determination of extraction by n hexane extraction of samples detection limit, precision and the recovery rate is superior to the other three solvents, nitrobenzene compounds spiked recovery rates come to be 80.8%~104%, the relative standard deviations(RSD) were less than 3%, the method determination limits were 0.002 μg/L~0.005 μg/L. This method can meet the test requirements. Drinking water samples from 4 water factories in Guilin were analyzed by optimized test method. The results indicates that, nitrobenzene, 1,3 dinitrobenzene and 1 chloro 2, 4 dinitrobenzene were not detected, other 7 nitrobenzene compounds were detected, but the concentrations were all less than environmental quality standards for surface water and standards for drinking water quality in the provides of limited value. |
