According to the national standard GB/T13610-2020 Composition Analysis of Natural Gas - Gas Chromatography Method. Representative natural gas samples and standard mixtures with known compositions are separated by gas chromatography under the same operating conditions. Many heavy components in the gas sample can obtain a set of irregular peaks at a certain time by changing the direction of the carrier gas flowing through the column. These heavy components can be C and heavier components, C and heavier components, or C and heavier components. Calculate the corresponding composition of the gas sample by comparing the peak height, peak area, or both based on the composition values of the standard gas.

GB/T5750.1 Methods for Testing Drinking Water Standards Part 1: General Principles GB/T5750.3 Methods for Testing Drinking Water Standards Part 3: Water Quality Analysis and Quality Control GB/T5750.4-2023 Methods for Testing Drinking Water Standards Part 4: Sensory and Physical Characteristics GB/T5750.5-2023 Methods for Testing Drinking Water Standards Part 5: Inorganic Non metallic Indicators GB/T 5750.8-2023 Methods for Testing Drinking Water Standards Part 8: Organic Matter Indicators

Heptafluoropropane (HFC-227ea/FM200) is a clean gas chemical fire extinguishing agent that mainly uses chemical fire extinguishing and also has physical fire extinguishing effects. It belongs to the category of polyfluoroalkanes and has the molecular formula C3HF7; Although heptafluoropropane is relatively stable at room temperature, it still decomposes at high temperatures, producing hydrogen fluoride that has a pungent odor. Other combustion products include carbon monoxide and carbon dioxide.

A small amount of spice is analyzed by gas chromatography on a column filled with appropriate substances under specified conditions. If necessary, different components are identified by retention index, and specific components are quantitatively determined by measuring peak area.

Under the selected chromatographic working conditions, introduce the gas sample into the chromatographic system and effectively separate dimethyl ether from various components of liquefied petroleum gas through a chromatographic column. Record the chromatographic peak value of dimethyl ether. Under the same chromatographic working conditions, an external standard method is used to analyze a standard gas with a known dimethyl ether content. The measured peak values of dimethyl ether in the sample are compared with those in the standard gas to calculate the dimethyl ether content in the sample.

The main function is to use the gas path system, pressure control system, and temperature control system of gas chromatography to analyze various gas products produced by CO2 catalytic reduction, such as oxygen, hydrogen, carbon monoxide, methane, ethylene, ethane, etc. The catalytic reduction of carbon dioxide into high-value products can not only alleviate the environmental problems caused by the greenhouse effect due to high carbon dioxide content in the atmosphere, but also produce energy fuels with objective economic benefits. For the analysis of products, gas chromatography is usually used for detection and analysis.