Product Introduction:

The significance of detection:
The national production and use of unleaded gasoline is aimed at improving the environmental pollution caused by lead in gasoline emissions. Adding alcohols, ethers, and other compounds to gasoline can increase octane rating and reduce volatility. There are regulations on the type and concentration of oxygen-containing compounds added. Control and adjust its content during the production process to achieve the quality of commercial gasoline.
Execution standard: GB 17930-2006 "Gasoline for Vehicles"
GB 18351-2004 "Ethanol Gasoline for Vehicles"
SH/T 0663-1998 "Determination of Alcohol Ether Content in Gasoline"
SH/T 0693-2000 "Determination of Aromatic Content in Gasoline"
Unique advantages of GC-7900 instrument:
Gas chromatograph for analysis of gasoline oxidesGC-7900 is a specialized gas chromatograph developed by our company according to national standards for detecting the type and concentration of oxygen compounds added to gasoline. The instrument adopts advanced technologies at home and abroad, combined with more than 50 years of gas chromatography production and analysis technology in the southern Shandong region, and is equipped with an imported fully automatic injection switching valve（VALCO valves and importsTCEP pre cut column, one-time injection into a specially designed high-sensitivity hydrogen flame detector FID for detection and analysis.
Gas chromatograph for analysis of gasoline oxidesGC-7900 is particularly suitable for use by third-party testing institutions, authoritative institutions for testing, and particularly accurate!!!

Analysis principle
● Oxygenated compounds:Add the internal standard ethylene glycol dimethyl ether (DME) to the sample, first enter the TCEP pre cut column, empty the light hydrocarbons, switch before the peak of methylcyclopentane, and allow oxygen-containing compounds to enter the WCOT column. After the tert amyl methyl ether flows out, reset and blow back the heavy hydrocarbon components.
Analysis of Benzene and Toluene:
Add internal standard 2-hexanone to the sample, first enter the TCEP pre cut column, empty C9 and lighter non aromatic hydrocarbons than C9, then switch before benzene flows out, allowing benzene, toluene, and 2-hexanone to enter the WCOT column. After 2-hexanone flows out, reset and blow back other components (C8 and C8 above aromatic hydrocarbons and C10 and C10 above non aromatic hydrocarbons)

Analyze spectra





Gas chromatograph for analysis of gasoline oxidesGC-7900 Technical Parameters:
Column box:
Temperature control range: Room temperature+5 ℃~450 ℃ (increments of 0.1 ℃)
◆ Number of ascending orders: 13.
◆ Lift rate: 0.1 ℃~50 ℃ (incremental 0.1 ℃)
◆ Cheng Sheng holding time: can be set by the user themselves
Sample injector:
Up to 3 injection systems can be installed simultaneously
◆ Injection unit: Fill column injection system
Split/non split capillary injection system (with diaphragm cleaning function)
◆ Temperature control range: Room temperature+5 ℃~450 ℃
Detector:
Up to three detectors can be installed simultaneously
◆ Temperature control range: Room temperature+5 ℃~450 ℃
Thermal conductivity detector (TCD):
Sensitivity: S ≥ 8000mv.ml/mg (n-hexadecane)
Dynamic range: ≥ 106
Baseline noise: ≤ 20uV (with a carrier gas of 99.999% hydrogen) (if the tested component contains hydrogen, argon can be used)

Instrument configuration: