Equipment | Physical Properties Testing |Surface Area Analyzers

Surface Area Analyzers

The surface area of materials, particularly powdered porous materials, is an extremely important property due to its role in the bioavailability of pharmaceuticals, the dispersion of dyes, the adsorption capacity of carbon, and many more applications. Within a surface area analyzer, a sample is placed in a sealed chamber. Inside the chamber, gas adsorbate molecules, typically those from an applied nitrogen, helium, argon, or carbon dioxide gas, will enter onto the surface area of the material. By applying the Brunaur-Emmett-Teller (BET) theory, the number of adsorbed gas molecules required to form a monolayer onto the surface of the material can be calculated based on the amount of gas adsorbed at a given pressure.