page_title: Specific surface area
section_title: Measurement
hierarchical_section_title: Specific surface area / Measurement
caption_attribution_description: English: Raschig Rings one inch ceramic
context_page_description: Specific surface area is a property of solids defined as the total surface area of a material per unit of mass, or solid or bulk volume.
  It is a physical value that can be used to determine the type and properties of a material. It has a particular importance for adsorption, heterogeneous catalysis, and reactions on surfaces.
context_section_description: Values obtained for specific surface area depend on the method of measurement. In adsorption based methods, the size of the adsorbate molecule (the probe molecule), the exposed crystallographic planes at the surface and measurement temperature all affect the obtained specific surface area. For this reason, in addition to the most commonly used Brunauer-Emmett-Teller (N2-BET) adsorption method, several techniques have been developed to measure the specific surface area of particulate materials at ambient temperatures and at controllable scales, including methylene blue (MB) staining, ethylene glycol monoethyl ether (EGME) adsorption, electrokinetic analysis of complex-ion adsorption and a Protein Retention (PR) method. A number of international standards exist for the measurement of specific surface area, including ISO standard 9277.
caption: Ceramic Raschig rings...
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