Product IntroductionPurity analysis of dimethyl ether synthesized from methanol using gas chromatographySuitable for the production, inspection, and sale of dimethyl ether produced by methanol gas-phase or liquid-phase dehydration, dimethyl ether directly synthesized from synthesis gas, or recovered dimethyl ether in other product production processes. The product type I is mainly used as an industrial raw material for propellants, foaming agents, refrigerants, chemical raw materials, etc. for aerosols, while type II is mainly used as a raw material for civil fuels, automotive fuels, and industrial fuels

Determination of Dimethyl Ether Content: Using gas chromatography, under selected chromatographic operating conditions, the sample is vaporized and passed through a chromatographic column to separate its components, which are then detected using a thermal conductivity detector; Alternatively, components such as carbon monoxide and carbon dioxide in the sample can be converted into hydrocarbons through a methane converter and detected using a flame ionization detector. Calculate the content of dimethyl ether using the normalized correction area method

Analysis methods and instruments used:

Hydrogen gas, with a volume fraction of ≥ 99.8%.

Nitrogen, with a volume fraction of ≥ 99.8%.

The air is purified by activated carbon and molecular sieves.

Calibration standard sample: commercially available, the background sample is dimethyl ether, containing corresponding impurity components (carbon monoxide, carbon dioxide, methane, ethylene, ethane, acetylene, propylene, propane, methanol, etc.), and the content of each component should be close to the actual sample situation.

instrument

Gas chromatograph: equipped with thermal conductivity detector (TCD) for capillary column operation, or equipped with flame ionization detector

The gas chromatograph with FID and methane converter (for converting carbon monoxide and carbon dioxide) has a sensitivity and stability that meet the requirements of the whole machine

The provisions of GB/T 9722-2006.

Recorder: Chromatography workstation or chromatography data processor.

Sample injector: 1mL glass syringe (such as BCG syringe, with good sealing), or self heating device

Dynamic six way valve, equipped with a 1mL quantitative ring.

Sampler: Made of stainless steel material, double valve liquefied petroleum gas sampler, complying with SH 0233-1992 regulations, with a working pressure greater than 3.1 MPa. Constant temperature water bath

Analysis spectrum:

Main business of Zhongkepu Company

（5） Free consultation, diagnosis, and resolution of hardware issues 2On site service and provision of consumables for maintenance 3Regularly hold training courses on chromatographic analysis applications and chromatographic maintenance 4Assist you in establishing a chromatographic analysis room and chromatographic analysis methods, and train chromatographic operators 5Undertake the installation, commissioning, maintenance and repair of various analytical instruments such as gas chromatography, liquid chromatography, ultraviolet spectroscopy, liquefied gas analyzer and Baijiu analyzer 6Undertake chromatographic analysis tasks and provide performance testing reports 7Main products:gas chromatograph,Liquid chromatograph,Liquefied gas analyzer,Baijiu chromatograph,Transformer oil spectrophotometer,Solvent Residual Chromatography Analyzer,Pesticide residue analyzer,Natural gas analyzer,Dimethyl ether detector,Gas chromatography consumables,Nitrogen hydrogen air generator;Fill the chromatographic column; liquid chromatographic column Chromatography accessories; Gas chromatography valve Headspace bottle Gas purifier; Deoxygenation tube; Capping pliers Gasification pad; Micro injector; capillary/Fill the column stone ink pad ；Flat gas injection six way valve

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