Analysis of Oxygen Compounds in GC-7820 Gasoline-Global supplier

Tengzhou High speed Railway New Area, Shandong Province (1 kilometer west of Tengzhou East Station on the Beijing Shanghai High speed Railway)

Instrument performance
A specialized chromatographic analysis system launched by Huifen Instrument Company is mainly used for the analysis of oxygen-containing compounds such as alcohols, ethers, and benzene in gasoline. Its process design fully meets GB17930-2006 "Automotive Gasoline"; GB18351-2004 "Ethanol Gasoline for Vehicles"; SH/T0663 "Determination of Certain Alcohols and Ether Oxygenates in Gasoline"; According to SH/T0693 "Determination of Aromatic Hydrocarbons in Gasoline". After the instrument is equipped with specialized analysis software, it can directly calculate various national standard required result expressions such as volume fraction, mass fraction, volume percentage, and mass percentage, and has density conversion function.

Analysis method
Add the internal standard ethylene glycol dimethyl ether (DME) to the sample, first enter the TCEP pre cut column, empty the light hydrocarbons, and then switch between methylcyclopentane and methyl tert butyl ether to allow oxygen-containing compounds to enter the WCOT column. After the tert pentyl methyl ether flows out, blow back the heavy hydrocarbon components.
Analysis of benzene and toluene: Add the internal standard 2-hexanone to the sample, first enter the TCEP pre cut column, and empty C₉Compared to C₉Light non aromatic hydrocarbons are then switched before benzene flows out, allowing benzene, toluene, and 2-hexanone to enter the WCOT column. After 2-hexanone flows out, the remaining components (C₈And C₈The above aromatic hydrocarbons and C₁₀And C₁₀The above non aromatic hydrocarbons
Aromatic hydrocarbon analysis: Add internal standard 2-hexanone to the sample, first enter the TCEP pre cut column, empty benzene, toluene, and non aromatic hydrocarbons less than C12, then switch before ethylbenzene flows out, let the aromatic hydrocarbons enter the WCOT column, wait for ortho xylene to flow out, and then blow back the remaining components (C₉And C₉The above aromatic hydrocarbons are detected by the detector.

Instrument configuration
GC-7820 gas chromatograph
Hydrogen flame FID detector, capillary system, blowback and reset system: Valco automatic ten way valve blowback and reset system

chromatographic column
Pre cut column: TCEP, 0.56m × 0.38mm stainless steel column, 20% TCEP/Chromosorb P (AW) 80-100 mesh
Analysis column: DB-1 (WCOT), 30m × 0.32mm × 3 μ m, cross-linked methyl silicone quartz capillary column

Standard Sample
Alcohol ether standards: alcohol ether qualitative standards, single component alcohol ether calibration standards, mixed alcohol ether calibration standards, alcohol ether internal standards, alcohol ether cutting standards
Aromatic hydrocarbon standards: Aromatic hydrocarbon qualitative standards, single component aromatic hydrocarbon calibration standards, mixed aromatic hydrocarbon calibration standards, aromatic hydrocarbon internal standards, aromatic hydrocarbon cutting standards
Chromatography specific anti control chromatography workstation
The calculation results directly obtain the oxygen content, volume fraction, mass fraction, volume percentage, and mass percentage; Density and molecular weight conversion work

Analyze the system flowchart

Actual sample spectrum

Determination of components and range

Component Name	range	Component Name	range
methanol	0.1%-12%	Isobutanol	0.1%-12%
ethanol	0.1%-12%	Tert-amyl alcohol	0.1%-12%
isopropanol	0.1%-12%	n-butanol	0.1%-12%
Tert butanol	0.1%-12%	TAME	0.1%-20%
n-PrOH	0.1%-12%	benzene	0.1%-5.0%
mtbe	0.1%-20%	toluene	1.0%-15%
Sec-butyl alcohol	0.1%-12%	C₈aromatic hydrocarbon	0.5%-10%
diisopropyl ether	0.1%-20%	≥C₉aromatic hydrocarbon	5.0%-30%
		total aromatics	10%-80%

List of users of oxygen-containing compounds

Shandong Huabin Chemical Technology
Shandong Lubei Chemical (Xinyue Petrochemical)
Henan Jiaozuo Quality and Technical Supervision and Inspection Center
Guangdong Lianyou Petrochemical Co., Ltd
Shantou Jinsha Chemical Plant Co., Ltd
Wuhan Qingjiang Chemical Co., Ltd
Wuhan Xinyuan Chemical Technology Co., Ltd
Danyang Picheng Chemical Plant
Inner Mongolia Qiankun Gold and Silver Refining Co., Ltd
Tongling Shuguang Chemical Plant
Chuzhou Fine Chemical Plant
Tongling Jinshan Chemical Company
Jiangxi Nuclear Industry Experimental Chemical Plant
Qiqihar Huifeng Chemical Industry Co., Ltd
Yongfei Chemical Co., Ltd., Shaowu City, Fujian Province
Guangdong Zhongcheng Chemical Co., Ltd
Kaifeng Dongda Chemical (Group) Co., Ltd
Changxing Mingzhu Chemical Plant