OREAS 112

OREAS 112 is a high grade Cu ore certified reference material (CRM) prepared from material sourced from the Tritton Copper Project near Nyngan, New South Wales. The deposit consists of sulphide ore bodies (massive pyrite and chalcopyrite breccias) underlying oxide ores. OREAS 112 is one of a suite of five CRMs and was prepared from massive pyrite material blended with chalcopyrite breccia ore. All five CRMs have been characterised for Ag, As, Cd, Co, Cu, Fe, Pb, Sb and Zn by 4-acid ICP and sodium peroxide fusion ICP methods.

Analyte Certified Value 1SD 95% Confidence Limits Low 95% Confidence Limits High Method
Cu, Copper (wt.%) 5.13 0.230 4.95 5.30 Peroxide Fusion ICP
Fe, Iron (wt.%) 33.30 1.800 31.80 34.80 Peroxide Fusion ICP
Ag, Silver (ppm) 17.0 5.0 7.0 26.0 Peroxide Fusion ICP
As, Arsenic (ppm) 240 30 216 264 Peroxide Fusion ICP
Cd, Cadmium (ppm) 15.0 3.0 12.0 18.0 Peroxide Fusion ICP
Co, Cobalt (ppm) 547 12 531 562 Peroxide Fusion ICP
Pb, Lead (ppm) 349 28 323 375 Peroxide Fusion ICP
Sb, Antimony (ppm) 17.0 2.0 13.0 22.0 Peroxide Fusion ICP
Zn, Zinc (ppm) 4302 195 4151 4452 Peroxide Fusion ICP
Ag, Silver (ppm) 13.2 1.20 12.3 14.0 4-Acid Digestion
As, Arsenic (ppm) 222 10 214 231 4-Acid Digestion
Cd, Cadmium (ppm) 14.6 2.2 13.6 15.6 4-Acid Digestion
Co, Cobalt (ppm) 551 33 529 574 4-Acid Digestion
Cu, Copper (wt.%) 5.10 0.240 4.95 5.25 4-Acid Digestion
Fe, Iron (wt.%) 34.10 0.900 33.40 34.80 4-Acid Digestion
Pb, Lead (ppm) 360 29 346 374 4-Acid Digestion
Sb, Antimony (ppm) 16.0 4.0 10.0 21.0 4-Acid Digestion
Zn, Zinc (ppm) 4351 223 4201 4502 4-Acid Digestion
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