ISO 18852:2015
Rubber compounding ingredients — Determination of multipoint nitrogen surface area (NSA) and statistical thickness surface area (STSA)
ISO 18852:2015 specifies a method for the determination of the nitrogen surface area (NSA) of carbon blacks and other rubber compounding ingredients, like silicas and zinc oxides, based on the Brunauer, Emmett and Teller (BET) theory of gas adsorption using a multipoint determination as well as the determination of the statistical thickness surface area (STSA), otherwise known as the external surface area. STSA, however, is not applicable to silica and zinc oxide.
The method can also be used for verifying "single-point" procedures described in ISO 4652 and other standards.
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Foreword
1 Scope
2 Normative references
3 Principle
4 Apparatus
5 Reagents
6 Preparation of automatic volumetric adsorption measurement apparatus
7 Sample preparation
7.1 General
7.2 Vacuum suction method
7.3 Purge gas flow method
8 Measurement procedure
8.1 Measurement
8.2 Selection of data points and determination of nitrogen surface area (NSA)
8.2.1 General
8.2.2 Procedure A
8.2.3 Procedure B
8.3 Verification of measured values
9 Determination of statistical thickness surface area (STSA)
9.1 General
9.2 Procedure
9.3 Calculation of STSA
9.4 Verification of measured values
10 Precision
11 Test report
Annex A (informative) Precision
Bibliography
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Foreword
1 Scope
2 Normative references
3 Principle
4 Apparatus
5 Reagents
6 Preparation of automatic volumetric adsorption measurement apparatus
7 Sample preparation
7.1 General
7.2 Vacuum suction method
7.3 Purge gas flow method
8 Measurement procedure
8.1 Measurement
8.2 Selection of data points and determination of nitrogen surface area (NSA)
8.2.1 General
8.2.2 Procedure A
8.2.3 Procedure B
8.3 Verification of measured values
9 Determination of statistical thickness surface area (STSA)
9.1 General
9.2 Procedure
9.3 Calculation of STSA
9.4 Verification of measured values
10 Precision
11 Test report
Annex A (informative) Precision
Bibliography