ISO 8332:2011
Rubber compounding ingredients — Sulfur — Methods of test
ISO 8332:2011 specifies methods of test for determining the main physical and chemical properties of sulfur used for compounding dry rubber. Typical levels for the relevant properties of sulfur for use as a rubber compounding ingredient are given in an annex.
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1 Scope
2 Normative references
3 Physical and chemical properties
4 Determination of total sulfur content
4.1 Principle
4.2 Reagents
4.3 Procedure
4.4 Expression of results
4.5 Precision
5 Determination of sieve residue
5.1 Principle
5.2 Method A
5.2.1 Apparatus
5.2.2 Procedure
5.2.3 Expression of results
5.3 Method B
5.3.1 Apparatus
5.3.2 Procedure
5.3.3 Expression of results
5.3.4 Precision
6 Determination of oil content of oil-treated sulfur
6.1 Principle
6.2 Hexane procedure
6.2.1 Reagents
6.2.2 Procedure
6.2.3 Expression of results
6.3 Sulfur-saturated hexane procedure
6.3.1 Reagents
6.3.2 Procedure
6.3.3 Expression of results
7 Determination of insoluble-sulfur content
7.1 Principle
7.2 Reference procedure using toluene
7.2.1 Reagents
7.2.2 Procedure
7.2.3 Expression of results
7.3 Alternative procedure using carbon disulfide
7.3.1 Reagents
7.3.2 Procedure
7.3.3 Expression of results
8 Determination of thermal reversion of insoluble sulfur
8.1 General
8.2 Method A
8.2.1 Principle
8.2.2 Apparatus
8.2.3 Reference procedure
8.2.3.1 Reagents
8.2.3.2 Procedure
8.2.4 Alternative procedure using carbon disulfide
8.2.4.1 Reagents
8.2.4.2 Procedure
8.2.5 Expression of results
8.3 Method B
8.3.1 Principle
8.3.2 Apparatus
8.3.3 Reagents
8.3.4 Chromatographic conditions)
8.3.5 Preparation of calibration curve (soluble sulfur)
8.3.6 DSC programme
8.3.7 Procedure for initial soluble sulfur
8.3.8 Procedure for soluble sulfur after 10-min exposure time
8.3.9 Expression of results
8.4 Precision
9 Determination of loss in mass at 80 °C
9.1 Principle
9.2 Apparatus
9.3 Procedure
9.3.1 Method A
9.3.2 Method B
9.4 Expression of results
9.5 Precision
10 Determination of ash at 850 °C to 900 °C
10.1 Principle
10.2 Apparatus
10.3 Procedure
10.4 Expression of results
10.5 Precision
11 Determination of acidity
12 Determination of arsenic content
13 Test report
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1 Scope
2 Normative references
3 Physical and chemical properties
4 Determination of total sulfur content
4.1 Principle
4.2 Reagents
4.3 Procedure
4.4 Expression of results
4.5 Precision
5 Determination of sieve residue
5.1 Principle
5.2 Method A
5.2.1 Apparatus
5.2.2 Procedure
5.2.3 Expression of results
5.3 Method B
5.3.1 Apparatus
5.3.2 Procedure
5.3.3 Expression of results
5.3.4 Precision
6 Determination of oil content of oil-treated sulfur
6.1 Principle
6.2 Hexane procedure
6.2.1 Reagents
6.2.2 Procedure
6.2.3 Expression of results
6.3 Sulfur-saturated hexane procedure
6.3.1 Reagents
6.3.2 Procedure
6.3.3 Expression of results
7 Determination of insoluble-sulfur content
7.1 Principle
7.2 Reference procedure using toluene
7.2.1 Reagents
7.2.2 Procedure
7.2.3 Expression of results
7.3 Alternative procedure using carbon disulfide
7.3.1 Reagents
7.3.2 Procedure
7.3.3 Expression of results
8 Determination of thermal reversion of insoluble sulfur
8.1 General
8.2 Method A
8.2.1 Principle
8.2.2 Apparatus
8.2.3 Reference procedure
8.2.3.1 Reagents
8.2.3.2 Procedure
8.2.4 Alternative procedure using carbon disulfide
8.2.4.1 Reagents
8.2.4.2 Procedure
8.2.5 Expression of results
8.3 Method B
8.3.1 Principle
8.3.2 Apparatus
8.3.3 Reagents
8.3.4 Chromatographic conditions)
8.3.5 Preparation of calibration curve (soluble sulfur)
8.3.6 DSC programme
8.3.7 Procedure for initial soluble sulfur
8.3.8 Procedure for soluble sulfur after 10-min exposure time
8.3.9 Expression of results
8.4 Precision
9 Determination of loss in mass at 80 °C
9.1 Principle
9.2 Apparatus
9.3 Procedure
9.3.1 Method A
9.3.2 Method B
9.4 Expression of results
9.5 Precision
10 Determination of ash at 850 °C to 900 °C
10.1 Principle
10.2 Apparatus
10.3 Procedure
10.4 Expression of results
10.5 Precision
11 Determination of acidity
12 Determination of arsenic content
13 Test report