Cars have brought great convenience to people and made significant contributions to the development of human society. However, at the same time, they consume a large amount of oil resources, emit a large amount of harmful gases, and cause significant harm to the human living environment. Nowadays, motor vehicle exhaust pollution has become the main source of urban pollution，Serious harm to people's physical health and living environmentAdd ether and alcohol oxygen-containing compounds to gasolineAnd aromatic hydrocarbonsIt can increase octane rating and reduce volatility. Added oxygen-containing compoundsAnd aromatic hydrocarbonsBoth types and concentrations are availablestrictRegulations should be made and adjusted to ensure that the quality requirements of commercial gasoline are met. The driving force, vapor pressure, phase separation, automobile exhaust emissions, and volatile automobile emissions are all related to the oxygen-containing compounds in the fuelAnd aromatic hydrocarbonsThere is a certain relationship. Therefore, oxygen-containing compoundsAnd aromatic hydrocarbonsAccurate detection is of great significance for various aspects such as gasoline quality.

GC-9860Gas chromatograph for detection and analysis of aromatic hydrocarbons in gasolineThe analysis system strictly followsSH/T0693-2000Method for determination of aromatic hydrocarbon content in gasoline (gas chromatography method)、SH/T0663-1998《gasolineDetermination of Alcohol and Ether ContentGB/T17930-2011The Vehiclegasoline》TheGB/T18351-2004Ethanol for Automotive Usegasoline》Relevant standardsAbsorb and establish a completegasolinedetectionanalysisGas chromatography scheme, selection**analysisThe conditions make this scheme have the advantages of simple operation, good linear correlation coefficient, high accuracy, high precision, and low cost, which are beneficial for improvementgasolineThe methods and product quality control in industrial processes have important practical significance. GC-9860Gas chromatograph for detection and analysis of aromatic hydrocarbons in gasolineSpecially designed for the determination of aromatic hydrocarbons in automotive gasoline, the determination of benzene and toluene content, and the analysis and detection of oxygen-containing compound alcohols and ethers. It is an ideal specialized gas chromatograph for refineries, petrochemical industries, and quality supervision and inspection related application fields.

1、 Instrument configuration

1．GC-9860Type gas chromatograph (with automatic ten way valve blowback and reset system)

2Detector: DualFID/Capillary Split Flow Non Split Injection System（SPL）

3Chromatographic column:A.Pre cut columnTCEP，0.56m×0.38mmStainless steel column;B.analytical columnDB-1（WCOT），30m×0.32mm×3μmCross linked methyl silicone quartz capillary column

4．N2000Chromatography workstation

5High purity air generator, hydrogen generator, nitrogen generator (or nitrogen cylinder)

6.Standard sample:

　　A.mellow wine/Ether qualitative standard sample

　　B.mixed alcohol/Ether calibration standard sample

　　C.mellow wine/Ether internal standard

　　DQualitative standard sample of aromatic hydrocarbons

　　EMixed aromatic hydrocarbon calibration standard sample

　　FAromatic internal standard

2、 Analysis process:

1Analysis of oxygen-containing compounds: Internal standard ethylene glycol dimethyl ether（DME）To add to the sample, first enterTCEPPre cut the column, empty the light hydrocarbons, and then switch between methylcyclopentane and methyl tert butyl ether to allow oxygen-containing compounds to enterWCOTColumn, wait for the outflow of tert amyl methyl ether, and then blow back heavy hydrocarbon components.

2Analysis of Benzene and Toluene: Internal Standard2-Ketone is added to the sample and first entersTCEPPre cut column, emptyC9Compared toC9Light non aromatic hydrocarbons, then switch between benzene and toluene before benzene flows out2-Ketone enteringWCOTColumn, wait2-After the ketone flows out, blow back the remaining components（C8andC8The above aromatic hydrocarbons andC10andC10The above non aromatic hydrocarbons

3Aromatic hydrocarbon analysis: using internal standards2-Ketone is added to the sample and first entersTCEPPre cut column, empty benzene, toluene and less thanC12Switch between non aromatic hydrocarbons before ethylbenzene flows out, allowing aromatic hydrocarbons to enterWCOTColumn, wait for ortho xylene to flow out, then blow back the remaining components（C9andC9The above aromatic hydrocarbons are detected by the detector.

The gas chromatograph for detecting and analyzing aromatic hydrocarbons in gasoline meets the standards:

（1）SH/T 0693-2000Determination of Aromatic Hydrocarbons in Gasoline

（2）GB 18351-2004Ethanol gasoline for vehicles

（2）SH/T 0663-1998Determination of Certain Alcohols and Ether Oxygenates in Gasoline

（3）GB 17930-2011Automotive Gasoline
companyApplication Fields of Gas Chromatography and Relevant Analysis Examples：
1、 Application areas:
1Petroleum and Petrochemical Industrycolour spectrumanalysis:
Chemical analysis, crude oil analysis, refinery gas analysis, simulated distillation, oil analysis, elemental hydrocarbon analysis, and sulfur-containing analysis in oil and gas field exploration/nitrogenous/Analysis of oxygen-containing compounds, gasoline additives, fatty hydrocarbons, and aromatic hydrocarbons.
2Environmentcolour spectrumanalysis:
Air pollutant analysis, water analysis, soil analysis, solid waste analysis.
3Foodcolour spectrumanalysis:
Pesticide residue analysis, essence analysis, additive analysis, fatty acid methyl ester analysis, food packaging materials analysis.
4Drugs and clinical practicecolour spectrumanalysis:
Analysis of estriol, catecholamine metabolites, urinary levels of pregnanediol and estriol, plasma levels of testosterone, and blood levels of ethanol/Analysis of anesthetics and amino acid derivatives.
5Pesticide residuescolour spectrumanalysis:
Organochlorine pesticide residue analysis, organophosphate pesticide residue analysis, insecticide residue analysis, herbicide residue analysis, etc.
6Fine Chemicalscolour spectrumanalysis:
Additive analysis, catalyst analysis, raw material analysis, product quality control.
7Polymercolour spectrumanalysis:
Monomer analysis, additive analysis, copolymer composition analysis, polymer structure characterization/Impurity analysis and thermal stability research in polymers.
8Synthetic industrychromatographic analysis：
Method research, quality monitoring, and process analysis.
2、 Analysis Example:
（1） Natural gas constant analysis:
Select thermal conductivity detector, suitable for natural gas for urban gas useO2、N2、CH4、CO2、C2H6、C3H8、i-C40、n-C40、i-C50、n-C50Constant analysis of components. The analysis results comply with the national standardGB10410.2-89.
（2） Artificial gas analysis:
Choose thermal conductivity detector, dual valve multi column system, automatic or manual injection, suitable for artificial gasH2、O2、N2、CO2、CH4、C2H4、C2H6、C3H6Determine the main components. The analysis results comply with the national standardGB10410.1-89.
(3)①Analysis of liquefied petroleum gas:
Select thermal conductivity detector, packed column system, automatic or manual valve switching, and equipped with blowback system, suitable for liquefied petroleum gas in refineriesC2-C4And overallC5Analysis of hydrocarbon composition (excluding dienes and alkynes). The analysis results are consistent withSH/T10230-92.
②Analysis of liquefied petroleum gas:
Select thermal conductivity detector, fill column system, valve automatic or manual switching, and equipped with blowback system, suitable for use in liquefied petroleum gasC5Analysis of the following gaseous hydrocarbon components (excluding alkynes). The analysis results are consistent withGB10410.3-89.
（4） Refinery gas analysis:
Using thermal conductivity and hydrogen flame ionization detectors, packed column and capillary column separation, automatic switching of multiple valves and signals, achieving one-time injection, multidimensional chromatographic analysis, and rapid analysisH2、O2、N2、CO2、CO、C10-C60、C2two-C4Two andC6The above hydrocarbons and other components. The analysis results have good repeatability and are easy to operate, which can be compared with imported instruments from abroad.
（5） In automotive and aviation gasolineC6HcreachC7H8analysis:
Choose a thermal conductivity detector or a hydrogen flame ionization detector, connect two columns in series, switch automatically through a valve, and be equipped with a blowback system to achieve one-time injection of gasolineC6H6reachC7H8Qualitative and quantitative analysis. The analysis results comply with the national standardGB17930-1999.
（6） Analysis of certain alcohols and ethers in gasoline:
Using a hydrogen flame ionization detector, a multi column system, automatic switching and blowback of a ten way valve, and direct injection analysis of certain alcohols and ethers in gasoline. Especially suitable for the analysis of alcohols and ethers in automotive and aviation gasoline, as well as gasoline containing ethanol. Refer to ministerial level standardsSH/T0663-1998.
（7） Indoor air detection and analysis:
Choose a hydrogen flame ionization detector, equipped with a thermal desorption sampler, packed column or capillary column, in accordance with national standardsGB50325-2001Using a dedicated chromatographic column can complete the analysis of indoor airC6H6、C7H8、C8H10And total volatile organic compounds（TVOC）The testing. Using derivative gas chromatography2.4-Derived from dinitrophenylhydrazine, extracted with cyclohexaneOV-17andQF-1Mixed coating chromatography column separation using electron capture detector（ECD）Compared with using colorimetric method to determine formaldehyde in indoor air, it has the advantages of sensitivity, accuracy, non-interference, and easy preservation of reagents.
（eight）Gas chromatography analysis of transformer oil cracking products:
Using hydrogen flame ionization detector and thermal conductivity detector,NiCatalytic converter, automatic switching of six way valve, no secondary diversion system, allowing it to handle the cracking products of transformer oil（8One time automatic analysis of various component gases, with accurate quantification and high sensitivity. Microcomputer control can be implementedFID/TCDThe output signal automatically switches.
The sampling method of oscillation degassing can be used, or an externally purchased automatic headspace sampler can be used for automatic sampling. The analysis results fully comply with the national standardGB7252-2001requirement.
(9)other:
In addition to the above analysis, odor analysis in food can be achieved using solid-phase microextraction devices and headspace technology. Utilize blowing and sweeping-Capture injection technology is used to analyze volatile aromatic hydrocarbons in wastewater and volatile organic compounds in drinking water.PTV-GC/ECD、NPDSimultaneous chromatographic analysis of multiple pesticide residues in environmental water.

The company is the earliest in ChinaIntegrated development and salesOne of several manufacturers of gas chromatographs,The name 'Land of Lunan Chromatography' comes from this. Company ProductsExcellent performanceStableReliable, it is a domestic chromatographyThe Influence of the WorldStable brand. For decades, and salesLu Chuang'sbrandGCSeries gas chromatographs andLCSeries liquid chromatography instrumentSpread all over * * * *.It is widely used in health and epidemic prevention, food supervision, environmental detection, quality supervision, petrochemical industry, fine chemical industry, coal mine, commodity inspection, power, Baijiu, aquatic products, mines and other systems, as well as scientific research institutions, colleges and universities.

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