Product Introduction:

Gas chromatograph for benzene and toluene in petrochemical gasolineG60-DSSuitable for the determination of benzene and toluene content in gasoline. The range of benzene content determination is 0.1%~5% (volume fraction), and the toluene content is 2%~20% (volume fraction)Number). Meets ASTM standardsD3606 method standard and SH/T 0713-2002 method standard of the Republic's petrochemical industry.

The ether compounds such as methyl tert butyl ether added to finished gasoline do not interfere with the determination of benzene and toluene1，2，3-Three（2-Cyanoethoxy) propane（TCEP）When using a packed column as an analytical column, it is not suitable for gasoline containing ethanol, and methanol may also cause interference. Using modified polyethylene glycol（FFAP）When analyzing the capillary column, the interference of methanol and ethanol is not significant.

The instrument system is simple, easy to operate, low in investment cost, and easy to maintain; However, it is not suitable for determining the total aromatic hydrocarbon content in gasoline, nor is it suitable for determining the benzene content in ethanol gasoline.

To meet the requirements of ASTM D3606Method standards and * Republic petrochemical industry standardsSH/T 0713-2002Method standards: We rigorously debug and test every instrument that leaves the factory.

working principle:

Gas chromatograph for benzene and toluene in petrochemical gasolineG60-DSThe analysis system consists of a six way valve, a pre column, and an analysis column. Pre column is a chromatographic column filled with a non-polar stationary phase (methyl silicone), which utilizes its characteristic of separating sample components in boiling point order to achieve pre separation of benzene and toluene from heavy hydrocarbons; The analytical column is a column filled with a strongly polar stationary phase1,2,3-three(2-Cyanoethoxy)propane(TCEP)Or modified polyethylene glycol(FFAP)The chromatographic column is mainly used for separating aromatic hydrocarbons and non aromatic compounds smaller than octane. The method uses thermal conductivity detector or hydrogen flame ionization detector for measurement and internal standard method for quantification. Add butanone to the sample first during analysis（MEK）As an internal standard, it is then introduced into the pre column. After the octane in the sample flows out of the pre column and enters the analysis column, the six way valve is placed in the blowback state. On the analysis column, the octane and light components are separated and detected by the detector. The peak area is measured, and the concentration of each component is calculated based on the internal standard

Analysis chart:Analysis of Benzene and Toluene in Gasoline

Analysis chart of benzene and toluene in refined gasolineSpectrum 1, benzene; 2. 4-methyl-2-pentanone; 3. Toluene

Injection method: Split injection

Detector:FID

Peak order: Non aromatic compounds smaller than octane;1Benzene;2、4-methyl-2-Pentane;3Toluene;

Applicability: Compliant withASTM D3606 .