Lays down two methods for the determination of the total sulphur content in all types of carbon black for use in the rubber industry: Method A, using an oxygen bomb calorimeter; Method B, using a combustion furnace. The total sulphur content, expressed as a percentage by mass, is given by a formula.
ISO 1138:1981 history
2022ISO 1138:2022 Rubber compounding ingredients — Carbon black — Determination of sulfur content
2012ISO 1138:2007/Amd 1:2012 Rubber compounding ingredients - Carbon black - Determination of sulfur content - Amendment 1: Clarification of digestion temperature in Subclause 3.4.5
2007ISO 1138:2007 Rubber compounding ingredients - Carbon black - Determination of sulfur content