OREAS 991

OREAS 991 is a matrix-matched certified reference material (MMCRM) prepared from copper-gold-silver concentrate samples supplied by Newcrest Mining Limited’s Cadia Valley Operations near Orange, New South Wales, Australia.
Analyte Certified Value 1SD 95% Confidence Limits Low 95% Confidence Limits High Method
Cu, Copper (wt.%) 20.66 0.053 20.59 20.73 Classical Wet Chemistry
Au, Gold (ppm) 47.04 0.219 46.70 47.37 Pb Fire Assay
Ag, Silver (ppm) 48.1 0.90 47.2 49.1 4-Acid Digestion
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Certificate DataPack SDS NRAM (412 KB)
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  • 50g Sachet
    $28.50
    5,300 +
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