Benzene is an important basic chemical raw materials, coking benzene is one of the industrial production methods to obtain benzene. The content of thiophene and carbon disulfide directly affects the quality and use of coking benzene. So coking crude benzene as another source of benzene is becoming more and more important. At the same time due to the improvement of environmental quality requirements, the world for coking benzene in the sulfur content of the restrictions become more stringent.

      HH-SF-I, Gas Chromatography, Separation and Determination of Trace Impurities Thiophene and Carbon Disulfide in Benzene Benzene by Thiophene and Carbon Disulfide in Industrial Coking Benzene. And the gas flow velocity effect of the flame photometric tester was explored. The minimum detection amount of thiophene 0.05ppm, carbon disulfide 0.01ppm; relative parallel error of 5%, compared with the magenta colorimetric method relative error of 10%. Sample analysis time 8 minutes.