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Specific surface area (SSA) is a property of solids which is the total surface area of a material per unit of mass,〔http://goldbook.c60.kiev.ua/S05806.pdf IUPAC Compendium of Chemical Terminology 2nd Edition (1997)〕 solid or bulk volume,〔http://web.archive.org/web/20060905224652/http://www.soils.wisc.edu/~ss322/lectures/lec+8-11.pdf〕 or cross-sectional area. It is a derived scientific value that can be used to determine the type and properties of a material (e.g. soil or snow). It is defined either by surface area divided by mass (with units of m²/kg), or surface area divided by the volume (units of m²/m³ or m−1). It has a particular importance for adsorption, heterogeneous catalysis, and reactions on surfaces. ==Measurement== Values obtained for specific surface area depend on various parameters relating to 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,〔Cerato, A. and Lutenegger, A. (2002). Determination of surface area of fine-grained soils by the ethylene glycol monoethyl ether (EGME) method. Geotechnical Testing Journal. 25(3), 1-7〕 electrokinetic analysis of complex-ion adsorption 〔 and a Protein Retention (PR) method.〔Paykov, O., and Hawley, H. 2013. A Novel Method for Specific Surface Area Determination in Swelling Clays, Geotechnical Testing Journal (in press)〕 See http://cms.wsl.ch/fe/schnee/projekte/SSA/index_EN for more information 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Specific surface area」の詳細全文を読む スポンサード リンク
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