OREAS 313 reference material
Certified values
Zn3.55 %
Pb3.90 %
Ag, ppm75.6
Cu0.036 %
Material typeZinc-lead-silver ore
ManufacturerOREAS
Packaging—
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 zinc-lead-silver ores from the George Fisher mine (Mount Isa, Queensland, Australia) with barren rock. Replaces OREAS 136.
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.
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