Standardisation, Reference Materials and Comparative Measurements for Surface Area and Pore Characterisation

Summary This paper reviews current activities to standardise measuring procedures for surface area and pore size determination. Comparative measurements at different laboratories using candidate reference materials revealed that surfaces of highly dispersed materials can be affected remarkably during storing and sample preparation. On account of the fractal nature of these materials, the results depend on the measuring methods. Reference materials of dispersed materials are offered by national and international standardisation administrations and by industrial distributers. The standardisation of measuring methods becomes more and more international (ISO, IUPAC). The survey includes tables …

Standardization of sorption measurements and reference materials for dispersed and porous solids

Progress in the standardisation of particle and surface characterisation

In 1999, we published a comprehensive survey of standards and certified reference materials for dispersed and porous solids. The present paper summarises and reports on new standards and proposals.