This International Standard specifies a method using Wijs' solution to determine the iodine value (i.e. the residual unsaturation) of hydrogenated nitrile rubber (HNBR).
ISO 17564:2001 history
2008ISO 17564:2008 Raw hydrogenated nitrile rubber (HNBR) - Determination of residual unsaturation by iodine value
2001ISO 17564:2001 Nitrile rubber - Determination of residual unsaturation in hydrogenated nitrile rubber (HNBR) by iodine value