Gas Mixture refers to a gas composed of two or more gases mixed in a certain proportion. It is widely used in industrial, medical, scientific research and other fields to meet different needs. For example, a mixture of argon and carbon dioxide is commonly used as a shielding gas in welding; In healthcare, a mixture of oxygen and nitrogen can be used for respiratory therapy.

Gas Mixture refers to a gas composed of two or more gases mixed in a certain proportion. It is widely used in industrial, medical, scientific research and other fields to meet different needs. For example, a mixture of argon and carbon dioxide is commonly used as a shielding gas in welding; In healthcare, a mixture of oxygen and nitrogen can be used for respiratory therapy.

Food carbon dioxide (CO₂), is a colorless, odorless, non-toxic gas, has a wide range of applications in the food industry. It is mainly used for carbonation of beverages and gives special taste to carbonated beverages such as soda and cola. In addition, food-grade carbon dioxide can also be used as a refrigerant for food preservation, freezing and refrigeration, such as dry ice in the ice cream industry and long-distance refrigerated transportation. High purity food grade carbon dioxide can better protect food quality and taste, to ensure food safety.

Argon (Ar) is a colorless, odorless, and non-toxic inert gas with a relative atomic mass of 39.948. It is one of the components of air and is mainly produced through air liquefaction and distillation. Argon gas has stable chemical properties and is not easily reactive with other substances, so it has a wide range of applications in industry, such as being used as a welding shielding gas, bulb inflation, low-temperature freezing, photolithography process in semiconductor manufacturing, and inert atmosphere in scientific research experiments. In addition, argon gas has a density 1.4 times that of air at room temperature and is slightly soluble in water.

Oxygen (O₂) is an important component of the Earth's atmosphere, accounting for approximately 21% of the air volume and being the most abundant element. Oxygen is required for the oxidation of hydrocarbons, treatment of wastewater, rocket propellants, and for respiration of animals and humans in aviation, aerospace, and diving. Animal respiration, combustion, and all oxidation processes (including the decay of organic compounds) consume oxygen. But oxygen in the air can be continuously replenished through the photosynthesis of plants. In the cutting and welding of metals. It is a mixture of oxygen with a purity of 93.5%~99.2% and combustible gas (such as acetylene) to produce a flame at extremely high temperatures, thereby melting the metal. The metallurgical process cannot do without oxygen. Oxygen is also required to enhance the production process of nitric acid and sulfuric acid. By blowing a mixture of oxygen and water vapor into a gasifier without using air, high calorific value gas can be obtained. Medical gas is extremely important.

Carbon dioxide (CO₂) is a colorless and odorless gas that is an important component of the Earth's atmosphere and a key substance in many industrial processes and biological activities. In nature, carbon dioxide is absorbed by plants through photosynthesis and converted into oxygen, while also being released during respiration and combustion processes. As one of the greenhouse gases, carbon dioxide has a significant impact on the Earth's climate system, and excessive emissions can lead to global warming. In industry, carbon dioxide is commonly used in the production of carbonated beverages, frozen foods, and as a protective gas in welding and firefighting.

Nitrogen (N₂) is one of the main components of air, accounting for approximately 78% of the total Earth's atmosphere. It is a colorless, odorless, and tasteless inert gas with stable chemical properties that is not easily reactive with other substances. In industrial production, nitrogen is often used as a protective gas, such as in welding, cutting, and food packaging processes, to prevent oxidation and corrosion caused by oxygen. In addition, nitrogen is also used in the manufacture of fertilizers, synthetic fibers, and as a refrigerant for freezing and refrigeration. Due to its inertness, nitrogen is also commonly used as an inert atmosphere in laboratories to protect sensitive substances from the influence of air.

Liquid nitrogen (LN₂) is the liquid form of nitrogen gas converted at extremely low temperatures (typically -196 ° C). It exhibits colorless, odorless, and tasteless characteristics, and is often used in various low-temperature applications due to its extremely low temperature. In scientific research, liquid nitrogen is often used as a cryogen for preserving biological samples, cryotherapy, and superconducting experiments. In addition, liquid nitrogen is also used in the food industry for rapid freezing of food to maintain its freshness and taste. At the same time, liquid nitrogen is also used to manufacture specialty foods such as liquid nitrogen ice cream, bringing people a unique taste experience.

Standard gas is a term in the gas industry. Standard substances are measurement standards with uniform concentration, good stability, and accurate measurement values. They play a fundamental role in reproducing, storing, and transmitting measurement values. They are used in the fields of physics, chemistry, biology, and engineering measurement to calibrate measuring instruments and processes, evaluate the accuracy of measurement methods and the detection capabilities of testing laboratories, determine the characteristic values of materials or products, and perform value arbitration.

Nitrogen (N₂) is one of the main components of air, accounting for approximately 78% of the total Earth's atmosphere. It is a colorless, odorless, and tasteless inert gas with stable chemical properties that is not easily reactive with other substances. In industrial production, nitrogen is often used as a protective gas, such as in welding, cutting, and food packaging processes, to prevent oxidation and corrosion caused by oxygen. In addition, nitrogen is also used in the manufacture of fertilizers, synthetic fibers, and as a refrigerant for freezing and refrigeration. Due to its inertness, nitrogen is also commonly used as an inert atmosphere in laboratories to protect sensitive substances from the influence of air.

Helium (He) is a colorless, odorless, and tasteless rare gas with extremely inactive chemical properties. It is the second most abundant element in the universe, but its concentration in the atmosphere is extremely low. Helium has extremely low density and melting point, as well as high thermal conductivity, making it widely used in scientific research, industry, medical and other fields. For example, in superconducting technology, liquid helium is used to manufacture superconducting equipment; In the field of diving, helium is mixed with oxygen to improve the safety and efficiency of diving operations. In addition, helium is also used for welding protection, balloon inflation, magnetic resonance imaging, and other purposes.

Hydrogen (H₂) is a simple substance formed from the element hydrogen, with a molecular weight of 2.01588. Hydrogen gas at room temperature and pressure is a colorless, odorless, highly flammable, and insoluble gas in water. The density of hydrogen is 0.089g/L (101.325kpa, 0°C), which is only 1/14 of that of air, making it the least dense gas known in the world. So hydrogen can be used as a filling gas for airships and hydrogen balloons (due to its flammability and low safety, helium is often used to fill airships). Hydrogen reacts with non metals with high electronegativity to exhibit reducibility, and reacts with active metals to exhibit oxidizability.

Carbon dioxide (CO₂) is a colorless and odorless gas that is an important component of the Earth's atmosphere and a key substance in many industrial processes and biological activities. In nature, carbon dioxide is absorbed by plants through photosynthesis and converted into oxygen, while also being released during respiration and combustion processes. As one of the greenhouse gases, carbon dioxide has a significant impact on the Earth's climate system, and excessive emissions can lead to global warming. In industry, carbon dioxide is commonly used in the production of carbonated beverages, frozen foods, and as a protective gas in welding and firefighting.

Oxygen (O₂) is an important component of the Earth's atmosphere, accounting for approximately 21% of the air volume and being the most abundant element. Oxygen is required for the oxidation of hydrocarbons, treatment of wastewater, rocket propellants, and for respiration of animals and humans in aviation, aerospace, and diving. Animal respiration, combustion, and all oxidation processes (including the decay of organic compounds) consume oxygen. But oxygen in the air can be continuously replenished through the photosynthesis of plants. In the cutting and welding of metals. It is a mixture of oxygen with a purity of 93.5%~99.2% and combustible gas (such as acetylene) to produce a flame at extremely high temperatures, thereby melting the metal. The metallurgical process cannot do without oxygen. Oxygen is also required to enhance the production process of nitric acid and sulfuric acid. By blowing a mixture of oxygen and water vapor into a gasifier without using air, high calorific value gas can be obtained. Medical gas is extremely important.

Argon (Ar) is a colorless, odorless, and non-toxic inert gas with a relative atomic mass of 39.948. It is one of the components of air and is mainly produced through air liquefaction and distillation. Argon gas has stable chemical properties and is not easily reactive with other substances, so it has a wide range of applications in industry, such as being used as a welding shielding gas, bulb inflation, low-temperature freezing, photolithography process in semiconductor manufacturing, and inert atmosphere in scientific research experiments. In addition, argon gas has a density 1.4 times that of air at room temperature and is slightly soluble in water.

Neon (Ne) is a colorless, odorless, and tasteless rare gas with an atomic number of 10. Although its content in the air is rare, it has unique physical and chemical properties such as high chemical stability, low boiling and melting points, as well as good conductivity and thermal conductivity. After being electrified, neon gas can emit orange red light, which makes it widely used in the fields of colored neon lights, indicator lights, voltage regulation, and laser mixtures. Meanwhile, neon gas can also be used as a low-temperature coolant, a refrigerant for superconducting equipment, and a detection medium in high-energy physics research.

Acetylene (C₂H₂) is an organic compound commonly known as coal or carbide gas. It is the smallest volume of alkyne compounds and is a colorless gas at room temperature and pressure. It is slightly soluble in water, soluble in ethanol, acetone, chloroform, benzene, and miscible in ether. It is an important raw material for organic synthesis and a monomer for synthesizing rubber, synthetic fibers, and plastics. It can also be used for oxyacetylene welding and cutting.

Silane (SiH₄), also known as silicon hydride. It is a colorless, flammable and toxic gas with a strong garlic odor. It is easily ignited in air, extremely sensitive to oxygen and air, and may even undergo explosive reactions with oxygen at temperatures of -180 ℃. Silane is widely used in various industries such as electronics, energy, glass, and high-tech, mainly as a key material for the production of liquid crystal TFTs, solar cells, semiconductors, and more. Due to its spontaneous combustion and toxicity, silane needs to be handled and stored with special care to avoid fire, explosion, and health hazards.