Gas adsorption analysis

The gas adsorption method (device autosorb iQ) serves to determine the specific surface area and pore size distribution of different materials, e.g. powders, blocks, granules, and composites. Its advantages compared to other methods are sensibility, accuracy, and application ranges. Measurement is based on the adsorption of a select inert gas, such as nitrogen or krypton, at liquid nitrogen temperature on the surface of the dry sample. The BET (Brunauer, Emmett and Teller) theory is subsequently applied to evaluate the adsorption data.

The measurements using the BET technique satisfy the standards:
• ISO 15901-2 Pore size distribution and porosity of solid materials by mercury porosimetry and gas adsorption — Part 2: Analysis of nanopores by gas adsorption;
• DIN ISO 9277: Determination of the specific surface area of solids by gas adsorption – BET method.