1.1 This test method covers the determination of the iodine adsorption number of carbon black. 1.1.1 Method A is the original test method for this determination and Method B is an alternate test method using automated sample processing and analysis. 1.2 The iodine adsorption number of carbon black has been shown to decrease with sample aging. New SRB HT Iodine Standards have been produced that exhibit stable iodine number upon aging. These SRB