Benzene is the main raw material for the production of styrene, benzene thiophene concentration of the general requirements of less than 0.6mg / kg. At present the national standard is used in chemical analysis, gas chromatography and mass spectrometry and other methods.

  Tengzhou City, the vast chromatographic equipment Technology Co., Ltd., with a pulse flame photometric detector (PFPD) of the gas chromatograph, by drawing different concentrations of thiophene and the response value of the correlation curve to calculate the benzene thiophene content.