1 This International Standard specifies three methods for the determination of free sulfur in vulcanized rubber: two versions of the copper spiral method, and the sodium sulfite method.
2 The copper spiral methods are also applicable, subject to the limitations described in clause 4, to unvulcanized compounds.
3 Annex A gives a table listing the sulfur contri-bution, as a percentage by mass, to these free-sulfur methods for various commercial accelerators.
BS 7164-24:1996 history
1996BS 7164-24:1996 Chemical tests for raw and vulcanized rubber. Determination of free sulfur
1990BS 7164 Pt.24:1990 Chemical tests for raw and vulcanized rubber. Determination of extractable sulphur