GC-2090Gas chromatography analyzer for detecting oxides in gasoline

This method has sufficient oxygen/hydrocarbon selectivity and sensitivity, ensuring that the determination of oxygen-containing compounds in gasoline is not interfered by a large amount of hydrocarbons.
【 Analysis Method 】 After adding an appropriate internal standard (ethylene glycol dimethyl ether) to the sample, the sample is introduced into a gas chromatograph equipped with two columns and a column switching valve. The sample first flows into the TCEP pre cut column, and the light hydrocarbons are flushed and emptied, while retaining the oxygen-containing compounds and heavier hydrocarbon components. After methylcyclopentane, but before MTBE flows out of the pre cut column, the valve is switched to the blowback position to allow the oxygen-containing compounds to enter the analysis column. Before any heavy hydrocarbons are separated, flush out the alcohols and ethers from the analytical column. After the benzene and tert amyl methyl ether flow out of the analytical column, switch the column back to the starting position to blow back heavy hydrocarbon components. Detect the components flowing out through a flame ionization detector, and based on the components
Calculate the peak area and refer to the internal standard to determine the concentration of each component

GC-2090Gas chromatography analyzer for detecting oxides in gasoline

[Product Configuration]
1. Instrument host: GC-2090 gasoline oxygen compound analysis gas chromatograph, Kepu brand
2. FID detector+capillary injection system+automatic ten way valve switching (with blowback function)
3. Data processing: Chromatography workstation (computer printer self equipped)
4. Chromatography column: 50 meter capillary column
5. Gas source: nitrogen hydrogen air generator
6. Random attachments
Analysis conditions
[Technical Parameters]
Technical specifications of GC-2090 gas chromatograph:
● Operation display: 5.7-inch color LCD touch screen
Temperature controlled area: 8 channels
Temperature control range: 4 ℃ to 450 ℃ above room temperature, increment: 1 ℃, accuracy: ± 0.1 ℃
● Program heating order: 20 orders
● Lift rate: 0.1-60 ℃/min
● Gas path control: Full electronic pressure (EPC), electronic flow (EFC) control
Range: 0-100psi (pressure); 0-1000mL/min (flow rate)
Resolution: 0.01Psi (pressure); 0.01 mL/min (flow rate)
External events: 8 channels; Auxiliary control output 2 channels
Type of injector: packed column injection, capillary injection, six way valve gas injection, automatic injector
Number of detectors: 3 (multiple); FID, TCD, ECD, FPD, and NPD are optional
● Start injection: manual or automatic options are available
● Communication interface: Ethernet: IEEE802.3
Technical specifications of detector:
Hydrogen flame ionization detector (FID)
Detection limit: ≤ 1Pg
Baseline noise: ≤ 1PA
Baseline drift: ≤ 1PA/30min
● Linear range: ≥ 106
Thermal conductivity detector (TCD)
Sensitivity: S ≥ 6000mV • ml/mg (n-hexadecane)
Baseline noise: ≤ 20 μ V
Baseline drift: ≤ 30 μ V/30min
● Linear range: ≥ 104