1 Scope
This document specifies an atomic absorption spectrometric method for the determination
of the copper content of rubbers.
The method is applicable to raw rubber and rubber products having copper contents
above 1 ppm. Copper contents below this limit can be determined, provided that suitable
adjustments are made to either the mass of the test portion or to the concentrations
of the solutions used, or both. The use of the standard additions method can lower
the bottom limit of detection.