ASTM D 1278 - 91a (Reapproved 2015) Standard Test Methods for Rubber from Natural Sources - Chemical Analysis

Current edition approved Sept. 1, 2015. Published December 2015. Originally approved in 1953. Last previous edition approved in 2011 as D1278 – 91a (2011). — 6 p.
These test methods cover the sampling and chemical analysis of solid natural rubber in the forms supplied to the rubber industry.
The analytical procedures appear in the following order:
Sampling
Volatile Matter
Dirt
Ash
Copper (Referee Colorimetric Method)
Copper (Alternative Colorimetric Method)
Copper (Alternative Flame Atomic Absorption Method)
Manganese (Colorimetric Method)
Manganese (Alternative Flame Atomic Absorption Method)
Iron (Colorimetric Method)
Acetone Extract
Rubber Hydrocarbon
Nitrogen