Rubber, raw synthetic — Determination of antidegradants by high-performance liquid chromatography

ISO 11089:2010 describes a procedure for the determination of the following antidegradants in raw synthetic rubbers:

• N‑alkyl-N'‑phenyl-p‑phenylenediamine;
• N‑aryl-N'‑aryl-p‑phenylenediamine;
• poly‑2,2,4‑trimethyl-1,2‑dihydroquinoline.

Extender oils, when present, can interfere.

The method, with modification if necessary, can be applied to the determination of other amine antidegradants.