UOP 821-81

This method uses a Micromeritics Digisorb 2500 Analyzer for determining the distribution of surface area, pore volume (size) and length among the micropores, 60 nm (600 A) and smaller, as well as total surface area, total pore volume and average micropore diameter for porous substances. The computer software provides for the choice of many analytical variations including four different methods, eight different modes and fifteen different combinations of plots as described in the instrument "Instruction Manual," and also see NOTE.