Gas Adsorption Analyzers

Gas adsorption analysis is used to measure the specific surface area and pore size distribution of solid or powdered materials. The dried sample to be analyzed is cooled to a temperature of 77 K once all gas has been evacuated from the material. At 77K, the temperature of liquid nitrogen, inert gasses physically adsorb onto the surface of the sample material, causing layering of the surface molecules to allow for accurate measurement of surface area and pore size distribution to be analyzed. The three types of instruments capable of gas adsorption are known as static, or fully equilibrated, continuous flow, or quasi-equilibrated, and dynamic, or chromatographic.