BET Altamira

: The BET surface area is the total surface area (m2/g) per unit mass of material. The pore size distribution refers to the change of pore volume with the pore size of the material. Both are the most important physical properties of porous materials, especially nano-materials. There are many methods for determining BET surface area and pore size distribution. Nitrogen adsorption is the most commonly used and reliable method Brunauer-Emmett-Teller (BET) surface area analysis is the multi-point measurement of an analyte’s specific surface area (m2/g) through gas adsorption analysis, where an inert gas such as nitrogen is continuously flowed over a solid sample, or the solid sample is suspended in a defined gaseous volume. Small gas molecules adsorb to the solid substrate and its porous structures due to weak van der Waals forces, forming a monolayer of adsorbed gas. This monomolecular layer, and the rate of adsorption, can be used to calculate the specific surface area of a solid sample and its porous geometry, informing studies into the reactivity and bioavailability of pharmaceutical products.