OREAS 317 reference material

Certified values

Values from the manufacturer's certificate. Exact tolerances (1SD, confidence intervals) are given in the certificate supplied with the pack.

About the material

A blend of barren black slate with ores and concentrates from the Dugald River, Black Star and Cannington deposits (Queensland, Australia).

What it is used for

Inserted into zinc-lead ore batches to check the accuracy of zinc, lead, silver and copper assays by 4-acid digestion. Gold is not certified in this material.