OREAS 113

OREAS 113 is a very 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 113 is one of a suite of five CRMs and was prepared from 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.%) 13.30 0.500 12.70 13.80 Peroxide Fusion ICP
Fe, Iron (wt.%) 28.00 2.100 26.10 29.80 Peroxide Fusion ICP
As, Arsenic (ppm) 238 33 207 269 Peroxide Fusion ICP
Ag, Silver (ppm) ~25.0 Peroxide Fusion ICP
Cd, Cadmium (ppm) ~16.0 Peroxide Fusion ICP
Co, Cobalt (ppm) 754 28 708 801 Peroxide Fusion ICP
Pb, Lead (ppm) 248 14 232 265 Peroxide Fusion ICP
Sb, Antimony (ppm) 7.60 1.00 6.10 9.00 Peroxide Fusion ICP
Zn, Zinc (ppm) 4158 196 3997 4320 Peroxide Fusion ICP
Ag, Silver (ppm) 22.6 1.70 21.3 23.8 4-Acid Digestion
As, Arsenic (ppm) 234 13 223 245 4-Acid Digestion
Cd, Cadmium (ppm) 15.5 2.0 14.8 16.3 4-Acid Digestion
Co, Cobalt (ppm) 766 27 746 787 4-Acid Digestion
Cu, Copper (wt.%) 13.50 0.400 13.30 13.80 4-Acid Digestion
Fe, Iron (wt.%) 28.20 1.000 27.50 28.80 4-Acid Digestion
Pb, Lead (ppm) 230 28 213 247 4-Acid Digestion
Sb, Antimony (ppm) 8.00 2.00 5.00 11.00 4-Acid Digestion
Zn, Zinc (ppm) 4178 248 4010 4346 4-Acid Digestion
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