BS ISO 21490:2022 pdf – Rubber and rubber products — Determination of 2-mercaptobenzothiazole content by high performance liquid chromatography

BS ISO 21490:2022 pdf free download.Rubber and rubber products — Determination of 2-mercaptobenzothiazole content by high performance liquid chromatography (HPLC). BS ISO 21490 specifies a quantitative test method to determine the 2-mercaptobenzothiazole content in rubber and rubber products by high performance liquid chromatography (HPLC). BS ISO 21490 delivers a method for quantifying 2-mercaptobenzothiazole in rubber products for a better selection of curing conditions. BS ISO 21490 provides a method to follow the curing of rubber with sulfur-and benzothiazolebased accelerators using a chemical measurement which is complementary to the classical rheometric technique. The 2-mercaptobenzothiazole in rubber is ultrasonically extracted with a chloroform-methanol solution determined and confirmed with HPLC-DAD (high performance liquid chromatography equipped with a diode-array detector). NOTE: There is a risk of neo-formed MBT from MBTs if a thiazole accelerator is used in the formulation of the sample.