OREAS 501e reference material
Certified values
Au, ppm0.230
Cu0.274 %
Mo, ppm93
Material typePorphyry copper-gold ore
ManufacturerOREAS
Packagingjar
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 porphyry copper-gold ores from the Ridgeway and Northparkes mines (New South Wales, Australia) with barren granodiorite.
What it is used for
Inserted into gold sample batches to check fire assay accuracy. A grade of 0.230 ppm suits QC of low-grade samples near cut-off. Certified copper checks the accuracy of copper and gold assays.
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