Detection Of Benzene Substances In Water By Headspace Capillary Gas Chromatography

Objective To study the methods for testing the Micro benzene substances in water based on the solution technology by headspace capillary gas chromatography-flame ionization detector(HSCGC-FID),such as benzene,toluene,ethyl benzene,dimethyl of p-xylene and m-xylene and ο-xylene benzene,isopropyl benzene and styrene,and provide a basis for detection of these substances.Methods The 13ml bottles of water was moved into headspace vial,the vial was sealed with hand seamer and was put in 65℃ oil bath for 40 minutes.The sample was detected by HSGC,qualitatively measured by its retentive time and quantified by peak area.Results There was a good linear relationship among various components in a suitable range,the regression coefficient was 0.998,the rate of recovery was in the range of 97-107%,the detection limit was in the range of 0.10～0.80μg/L,the RSD was less than6.5%.Conclusion For the detection of the Micro benzene substances in water,the method was rapid,sensitive and accurate,and suitable for wide use.