Determination of benzene series in water by automatic headspace-capillary gas chromatography

Objective:To set up the analysis methods of benzene series in water.Methods:Optimization of chromatographic conditions and headspace conditions,the introduction of automatic headspace capillary gas chromatography determination of benzene series in water.Results:The eight kinds of components in 7 minutes to complete and has good separation efficiency.In 1 μg/L～100 μg/L concentration range available to a good linear correlation coefficient of 0.999.The method used for synthetic water samples,the standard for the determination of the coefficient of variation of 1.6%～5.8%.The lowest detection concentration of 0.5 μg/L(benzene,toluene),1 μg/L(ethylbenzene,styrene,o-xylene,cumene) 2 μg/L(p,m-xylene).To participate in competition by Guangdong Center for Disease Control and Prevention,satisfactory results.Conclusion:The method is simple,rapid,and it has good precision and accuracy,which can be used for the determination of benzene in water.