BS ISO 9277:2010
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Determination of the specific surface area of solids by gas adsorption. BET method
Hardcopy , PDF
24-11-2022
English
30-09-2010
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Principle
6 Procedure
7 Evaluation of adsorption data
8 Test report
9 Use of reference materials
Annex A (informative) - Cross-sectional areas of some
frequently used adsorptives
Annex B (informative) - Certified reference materials for
the BET method
Annex C (informative) - Surface area of microporous
materials
Bibliography
Describes the determination of the overall specific external and internal surface area of disperse (e.g. nano-powders) or porous solids by measuring the amount of physically adsorbed gas according to the Brunauer, Emmett and Teller (BET) method.
| Committee |
LBI/37
|
| DevelopmentNote |
Supersedes BS 4359-1(1996) & 08/30180118 DC. (09/2010)
|
| DocumentType |
Standard
|
| Pages |
34
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
This International Standard specifies the determination of the overall (see Note) specific external and internal surface area of disperse (e.g. nano-powders) or porous solids by measuring the amount of physically adsorbed gas according to the Brunauer, Emmett and Teller (BET) method (see Reference [1]). It takes account of the International Union for Pure and Applied Chemistry (IUPAC) recommendations of 1984 and 1994 (see References [7][8]).
NOTE For solids exhibiting a chemically heterogeneous surface, e.g. metal-carrying catalysts, the BET method gives the overall surface area, whereas the metallic portion of the surface area can be measured by chemisorption methods.
The BET method is applicable only to adsorption isotherms of typeII (disperse, nonporous or macroporous solids) and typeIV (mesoporous solids, pore diameter between 2nm and 50nm). Inaccessible pores are not detected. The BET method cannot reliably be applied to solids which absorb the measuring gas.
A strategy for specific surface area determination of microporous materials (typeI isotherms) is described in AnnexC.
| Standards | Relationship |
| ISO 9277:2010 | Identical |
| ISO 15901-3:2007 | Pore size distribution and porosity of solid materials by mercury porosimetry and gas adsorption Part 3: Analysis of micropores by gas adsorption |
| ISO 15901-2:2006 | Pore size distribution and porosity of solid materials by mercury porosimetry and gas adsorption Part 2: Analysis of mesopores and macropores by gas adsorption |
| ISO 80000-1:2009 | Quantities and units — Part 1: General |
| ISO 8213:1986 | Chemical products for industrial use — Sampling techniques — Solid chemical products in the form of particles varying from powders to coarse lumps |
| ISO 15901-1:2016 | Evaluation of pore size distribution and porosity of solid materials by mercury porosimetry and gas adsorption Part 1: Mercury porosimetry |
| ISO/IEC Guide 98-3:2008 | Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) |
| ISO 14488:2007 | Particulate materials — Sampling and sample splitting for the determination of particulate properties |
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