This standard refers to the international standard ISO16541971 "Determination of Raw Rubber and Latex-Copper". This standard specifies the method for the determination of small amounts of copper in natural rubber latex. This method is only applicable to the natural latex of Hevea brasiliensis, not to compound latex and vulcanized latex.
GB/T 8295-1987 history
2008GB/T 8295-2008 Natural rubber and latex.Determination of copper content.Photometric method
1987GB/T 8295-1987 Natural rubber latex--Determination of copper content