[Product Name]Gas chromatograph for purity analysis of ethylene glycolAlso known as gas chromatography for the determination of impurities in ethylene glycol

【 Product Description 】 Ethylene glycol, also known as ethylene glycol or 1,2-ethylene glycol, is a colorless, odorless, and sweet tasting liquid that is toxic. Ethylene glycol is miscible with water and acetone, but has a low solubility in ethers. It can be used to synthesize polymer compounds such as polyester, and can also be used as raw materials for films, rubber, plasticizers, brake oils, etc. It is also a commonly used high boiling point solvent, and its 60% aqueous solution has a freezing point of -40 ℃. Therefore, it can be used as an antifreeze for winter car radiators and a refrigerant for aircraft engines. In recent years, the demand for polyester fibers and bottle polyester in China, Southeast Asia and other regions has grown rapidly, and the demand for ethylene glycol has also increased significantly. Therefore, the determination of ethylene glycol content is very important. The main determination methods in the current laboratory are the product red sulfite method and the chromogenic acid method to determine its acidity. Tengzhou Zhongkepu uses gas chromatography to determine the content of ethylene glycol. The method is simple, accurate, and has good repeatability, and can be used for the determination and control of ethylene glycol content

【 Analysis Method 】 Gas chromatography (GC) was used to determine the content of ethylene glycol, with a capillary column as the chromatographic column, nitrogen gas as the carrier gas, and a hydrogen flame ionization detector. The results indicate that the ethylene glycol content is 0 There is a good linear relationship between the peak area and the concentration range of 003~1.11 kg/L, with an average recovery rate of 99% 53%.

[Instrument Configuration]

1. Instrument host:GC-2020Kepu brand in gas chromatography
2. FIDdetector+Fill column injection system+Capillary column injection system (split flow)/Blow off)
3. Data processing: Chromatography workstation (computer printer self equipped)
4. Chromatographic column:30Mi capillary column
5. Gas source: nitrogen hydrogen air generator
6. Random attachments
7. Note: This configuration instrument isGas chromatograph for purity analysis of ethylene glycol

Analyze the spectrum

Peak Number Peak name Retention peak height peak area content

1 2.473 433.067 600.700 0.0126

2 glycol2.623 1277070.750 4727045.500 99.5005

3 3.123 170.950 129.200 0.0027

4 diethylene glycol3.307 299.714 717.471 0.0151

5 3.448 252.943 440.629 0.0093

6 3.707 2998.745 9160.900 0.1928

7 Triethylene glycol4.715 5560.881 12590.500 0.2650