1. Detection of common gases
| Air | Air is a colored and smelly gas. It is a mixture. |
| organic gas | Various volatile or gaseous alkanes, aromatics and their derivatives. |
| Refrigerant | Ammonia, Freon-12, Freon-22, R-134a, R-404A refrigerant, R-410A refrigerant, mixed azeotropic refrigerant, hydrocarbon refrigerant, carbon dioxide, etc. |
| natural gas | Liquefied natural gas, compressed natural gas, liquefied petroleum gas, liquefied coal bed methane, etc. |
| inert gas | Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe) and the radioactive Radon (Rn). |
| industry exhaust | Exhaust flow, flue gas temperature, flue gas pressure, sulfur dioxide, nitrogen oxides, particulate matter, hydrogen chloride, chromic acid mist, sulfuric acid mist, fluoride, chlorine, metals, benzene series, phenols, acetaldehyde, acrolein, benzene And[a]pyrene, nitrobenzene, phosgene, asbestos, dioxin, Ringelmann blackness, formaldehyde, methane, etc. |
| active gas | Oxygen, fluorine, chlorine, hydrogen, bromine, carbon monoxide, hydrogen cyanide, iodine vapor (gaseous iodine), alcohol vapor (gaseous ethanol), etc. |
| liquefied petroleum gas | Propane, butane, etc. |
| liquified natural gas | methane. |
| Toxic and harmful gas | Sulfur dioxide, fluorine to hydrogen, ammonia, sulfur trioxide, chlorine, carbon monoxide, hydrogen sulfide, hydrogen chloride, ozone, mercaptans, organic halides, formaldehyde, nitrogen dioxide, hydrocarbons, volatile phenols, nitric oxide, benzene, mercury steam etc. |
2. Gas detection project
| purity | peroxide | total hydrocarbon | Calorific value |
| moisture | carbon dioxide | methane | Wobbe Index |
| Ingredient content | density | unknown gas | Sulfide |
3. Gas detection method
【Gas Chromatography】
Gas chromatography is suitable for the analysis of hydrogen, oxygen, nitrogen, argon, helium, carbon monoxide, carbon dioxide and other inorganic gases, methane, ethane, propylene and most organic gases above C3. The gas chromatograph is mainly composed of a gas circuit system, a sampling system, a column thermostat, a chromatographic column, a Detector, and a data processing system. To analyze standard gases by gas chromatography, in order to obtain accurate and reliable analysis results, it is first necessary to establish an analysis method and select appropriate operating conditions and operating techniques.
【Chemiluminescence method】
Chemiluminescence is a method for analyzing components by using the luminescence phenomenon produced by certain chemical reactions. It has the characteristics of high sensitivity, good selectivity, simple method, and rapidity. It is suitable for the analysis of standard gases such as sulfide, nitrogen oxide and ammonia.
【Non-dispersive infrared analysis method】
The non-dispersive infrared Gas Analyzer uses different gas chambers and Detectors to measure the content of carbon monoxide, carbon dioxide, sulfur dioxide, ammonia, methane, ethane, propane, butane, acetylene and other components in the mixed gas. The non-dispersive infrared Gas Analyzer is mainly composed of infrared light source, sample chamber, filter, chopper, Detector, amplifier and data display device.
【Trace Oxygen Analyzer】
Trace oxygen analyzer: In the analysis of high-purity gas, almost all high-purity gases require accurate determination of the content of trace oxygen. Since the atmosphere contains a large amount (21%) of oxygen, it is one of the difficulties in gas analysis to accurately determine trace oxygen or even trace oxygen in high-purity gases.
【Trace Water Analyzer】
Trace moisture is also one of the main indicators to evaluate the quality of high-purity gas. Almost all high-purity gases have strict requirements on moisture. Only by accurately measuring and strictly controlling the moisture content in high-purity gases can the quality of high-purity gases be guaranteed.
4. Gas detection standard
| GB/T 3634.2-2011 | GB/T 16942-2009 | GB/T 16943-2009 |
| GB/T 5832.2-2008 | GB/T14604-2008 | GB/T14599-2008 |
| GB/T 8979-2008 | GB/T 4844-2011 | ASTM D 2622-2011 |
| ASTD 5197-2009 | GB/T15909-2007 | ······ |
