Abstract: A method for the determination of nitrobenzene compounds in surface water and groundwater by solid-phase extraction and gas chromatography is established. This paper introduces the various instrument parameters and specific sample extraction methods of using solid-phase extraction to purify samples,gas chromatograph electron capture detector to detect 15 nitrobenzene compounds in water. This method has good separation and accuracy. The correlation coefficients of standard curves for all substances are greater than 0.998,the lower limit of determination is between 0.005 5 μg/L and 0.097 μg/L,the accuracy,i.e. the spiked recovery rate is between 78.3% and 115%,and the precision,i.e. the relative standard deviation of the spiked recovery rate is between 1.3% and 9.0%.

Key words: solid-phase extraction, gas chromatography, nitrobenzene compounds