ASTM D 5376 - 06 (Reapproved 2017) Standard Test Method for Rubber Compounding Materials - Determination of the Basic Nitrogen Content in Rubber Antioxidant: Polymerized TMQ

Current edition approved May 1, 2017. Published July 2017. Originally approved in 1993. Last previous edition approved in 2012 as D5376 – 06 (2012). — 4 p.
This test method covers the determination of the nitrogen content of polymerized 2,2,4-trimethyl-1,2- dihydroquinoline (TMQ). It is based on a potentiometric titration of an acetone solution of TMQ with perchloric acid in acetic acid.