BET Surface Area Analysis
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.
Meritics has prepared a range of surface area analysers equipped for multi-point measurements of solid samples according to BET adsorption isotherms. The Horiba SA-9600 can measure BET surface area at a range of 0.10 to > 2,000 m2/g for intervals of just 6 minutes, while the Thermo Scientific Surfer uses static volumetric gas adsorption techniques to quantify the interaction of gases with free solid surfaces.
Explore our range of surface area analysers below. Or, if you would like any more information about performing BET surface area analysis, please do not hesitate to contact us.