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Significance and Use
4.1 The iodine adsorption number is useful in characterizing carbon blacks. It is related to the surface area of carbon blacks and is generally in agreement with nitrogen surface area. The presence of volatiles, surface porosity, or extractables will influence the iodine adsorption number. Aging of carbon black can also influence the iodine number.
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. One or more of these SRB HT Iodine Standards are recommended for daily monitoring (x-charts) to ensure that the results are within the control limits of the individual standard. Use all SRB HT Iodine Standards for standardization of iodine testing (see Section 8) when target values cannot be obtained.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D1799 Practice for Carbon Black--Sampling Packaged Shipments
D1900 Practice for Carbon Black--Sampling Bulk Shipments
D4483 Practice for Evaluating Precision for Test Method Standards in the Rubber and Carbon Black Manufacturing Industries
D4821 Guide for Carbon Black--Validation of Test Method Precision and Bias
E969 Specification for Glass Volumetric (Transfer) Pipets
European StandardsISO/EN/DIN8655-3 Piston-operated volumetric apparatus - Part 3: Piston burettes
ICS Number Code 83.040.20 (Rubber compounding ingredients)
UNSPSC Code 12171603(Carbon black)