OREAS 996

OREAS 996 was designed to replace OREAS 994 and was prepared from a blend of copper concentrates sourced predominantly from Chilean, Philippine and Australian mine site metallurgical plants. Copper, Iron and Sulphur by mass account for approx. 77 % of the total chemical composition of OREAS 996.

The certification program involved seventeen ‘umpire’ laboratories undertaking Copper assay (3 trials on undried sample) by classical wet chemistry (short iodide titration). Nineteen geoanalytical laboratories also participated to undertake:

  • Gold by fire assay with AAS, ICP-OES or gravimetric finish
  • Instrumental neutron activation analysis of Au on 20 x 1 g subsamples to confirm homogeneity
  • 4-acid (HNO3-HF-HClO4-HCl) digestion with full suite ICP-OES and ICP-MS elemental packages
  • Total S by infrared combustion furnace/CS analyser
  • Lithium borate or sodium peroxide fusion with full suite ICP-OES and ICP-MS elemental packages
  • Fluorine by ion selective electrode
Analyte Certified Value 1SD Expanded Uncertainty Low Expanded Uncertainty High Method
Cu, Copper (wt.%) 29.27 0.090 29.23 29.31 Classical Wet Chemistry
Au, Gold (ppm) 9.54 0.287 9.39 9.69 Pb Fire Assay
Ag, Silver (ppm) 145 3 141 148 4-Acid Digestion
Al, Aluminium (wt.%) 0.983 0.041 0.953 1.013 4-Acid Digestion
As, Arsenic (ppm) 926 55 880 973 4-Acid Digestion
Ba, Barium (ppm) 61 11 48 74 4-Acid Digestion
Be, Beryllium (ppm) < 0.50 IND IND IND 4-Acid Digestion
Bi, Bismuth (ppm) 307 27 286 329 4-Acid Digestion
Ca, Calcium (wt.%) 0.732 0.032 0.688 0.776 4-Acid Digestion
Cd, Cadmium (ppm) 48.7 3.63 45.1 52.3 4-Acid Digestion
Ce, Cerium (ppm) 61 13 49 73 4-Acid Digestion
Co, Cobalt (ppm) 208 10 200 215 4-Acid Digestion
Cr, Chromium (ppm) 29.7 2.60 27.3 32.1 4-Acid Digestion
Cs, Caesium (ppm) 1.56 0.073 1.43 1.68 4-Acid Digestion
Cu, Copper (wt.%) 29.61 0.459 29.05 30.17 4-Acid Digestion
Dy, Dysprosium (ppm) 1.12 0.21 0.80 1.45 4-Acid Digestion
Er, Erbium (ppm) 0.56 0.042 0.47 0.65 4-Acid Digestion
Eu, Europium (ppm) 0.52 0.047 0.42 0.62 4-Acid Digestion
Fe, Iron (wt.%) 22.46 0.522 21.93 22.98 4-Acid Digestion
Ga, Gallium (ppm) 4.04 0.225 3.71 4.37 4-Acid Digestion
Gd, Gadolinium (ppm) 1.90 0.29 1.56 2.25 4-Acid Digestion
Hf, Hafnium (ppm) 0.29 0.05 0.20 0.38 4-Acid Digestion
Ho, Holmium (ppm) 0.20 0.010 0.19 0.21 4-Acid Digestion
In, Indium (ppm) 13.5 0.64 12.8 14.2 4-Acid Digestion
K, Potassium (wt.%) 0.288 0.015 0.274 0.303 4-Acid Digestion
Li, Lithium (ppm) 7.66 0.77 6.78 8.55 4-Acid Digestion
Mg, Magnesium (wt.%) 0.269 0.021 0.251 0.288 4-Acid Digestion
Mn, Manganese (wt.%) 0.025 0.001 0.024 0.026 4-Acid Digestion
Mo, Molybdenum (wt.%) 0.191 0.012 0.181 0.202 4-Acid Digestion
Na, Sodium (wt.%) 0.126 0.008 0.117 0.135 4-Acid Digestion
Nb, Niobium (ppm) 1.36 0.126 1.21 1.52 4-Acid Digestion
Nd, Neodymium (ppm) 18.7 2.6 15.9 21.5 4-Acid Digestion
Ni, Nickel (ppm) 182 7 170 195 4-Acid Digestion
P, Phosphorus (wt.%) 0.025 0.002 0.024 0.027 4-Acid Digestion
Pb, Lead (wt.%) 0.136 0.005 0.132 0.141 4-Acid Digestion
Pr, Praseodymium (ppm) 5.74 0.71 4.90 6.58 4-Acid Digestion
Rb, Rubidium (ppm) 13.6 0.47 13.0 14.1 4-Acid Digestion
Re, Rhenium (ppm) 2.97 0.109 2.77 3.17 4-Acid Digestion
S, Sulphur (wt.%) 25.44 1.552 24.31 26.57 4-Acid Digestion
Sb, Antimony (ppm) 589 46 525 652 4-Acid Digestion
Sc, Scandium (ppm) 1.26 0.063 1.15 1.38 4-Acid Digestion
Se, Selenium (ppm) 168 21 152 185 4-Acid Digestion
Sm, Samarium (ppm) 2.63 0.28 2.10 3.16 4-Acid Digestion
Sn, Tin (ppm) 42.8 2.70 40.1 45.5 4-Acid Digestion
Sr, Strontium (ppm) 72 3.5 69 75 4-Acid Digestion
Ta, Tantalum (ppm) 0.093 0.007 0.086 0.100 4-Acid Digestion
Te, Tellurium (ppm) 21.4 3.9 18.4 24.5 4-Acid Digestion
Th, Thorium (ppm) 2.54 0.092 2.39 2.70 4-Acid Digestion
Ti, Titanium (wt.%) 0.048 0.004 0.045 0.052 4-Acid Digestion
Tl, Thallium (ppm) 3.41 0.236 3.16 3.65 4-Acid Digestion
U, Uranium (ppm) 4.31 0.136 4.07 4.55 4-Acid Digestion
V, Vanadium (ppm) 18.1 2.6 16.1 20.1 4-Acid Digestion
W, Tungsten (ppm) 23.8 1.35 22.4 25.1 4-Acid Digestion
Y, Yttrium (ppm) 5.57 0.441 5.01 6.12 4-Acid Digestion
Yb, Ytterbium (ppm) 0.48 0.046 0.37 0.60 4-Acid Digestion
Zn, Zinc (wt.%) 1.17 0.038 1.12 1.21 4-Acid Digestion
Zr, Zirconium (ppm) 8.75 0.90 7.48 10.01 4-Acid Digestion
S, Sulphur (wt.%) 27.66 0.695 27.07 28.25 Infrared Combustion
Al, Aluminium (wt.%) 1.02 0.019 1.00 1.05 Peroxide Fusion ICP
As, Arsenic (ppm) 996 49 933 1059 Peroxide Fusion ICP
Ba, Barium (ppm) 66 4.6 62 71 Peroxide Fusion ICP
Be, Beryllium (ppm) < 1.00 IND IND IND Peroxide Fusion ICP
Bi, Bismuth (ppm) 323 21 290 357 Peroxide Fusion ICP
Ca, Calcium (wt.%) 0.753 0.038 0.684 0.822 Peroxide Fusion ICP
Cd, Cadmium (ppm) 53 6 45 61 Peroxide Fusion ICP
Ce, Cerium (ppm) 73 6.9 64 82 Peroxide Fusion ICP
Co, Cobalt (ppm) 202 15 186 218 Peroxide Fusion ICP
Cs, Caesium (ppm) 1.56 0.28 1.17 1.95 Peroxide Fusion ICP
Cu, Copper (wt.%) 29.39 0.562 28.66 30.12 Peroxide Fusion ICP
Dy, Dysprosium (ppm) 1.42 0.133 1.21 1.63 Peroxide Fusion ICP
Er, Erbium (ppm) 0.83 0.11 0.64 1.01 Peroxide Fusion ICP
Eu, Europium (ppm) 0.53 0.05 0.40 0.66 Peroxide Fusion ICP
Fe, Iron (wt.%) 23.23 0.500 22.66 23.81 Peroxide Fusion ICP
Ga, Gallium (ppm) 4.17 0.80 3.00 5.35 Peroxide Fusion ICP
Gd, Gadolinium (ppm) 1.98 0.172 1.70 2.25 Peroxide Fusion ICP
Ho, Holmium (ppm) 0.27 0.04 0.23 0.31 Peroxide Fusion ICP
In, Indium (ppm) 13.8 1.06 12.1 15.5 Peroxide Fusion ICP
K, Potassium (wt.%) 0.296 0.027 0.269 0.323 Peroxide Fusion ICP
La, Lanthanum (ppm) 44.5 1.87 42.0 46.9 Peroxide Fusion ICP
Li, Lithium (ppm) 8.18 1.14 5.79 10.56 Peroxide Fusion ICP
Mg, Magnesium (wt.%) 0.286 0.013 0.266 0.306 Peroxide Fusion ICP
Mn, Manganese (wt.%) 0.026 0.003 0.025 0.028 Peroxide Fusion ICP
Mo, Molybdenum (wt.%) 0.209 0.007 0.200 0.217 Peroxide Fusion ICP
Nd, Neodymium (ppm) 23.7 1.78 21.3 26.0 Peroxide Fusion ICP
Ni, Nickel (ppm) 190 26 169 212 Peroxide Fusion ICP
Pb, Lead (wt.%) 0.141 0.008 0.131 0.150 Peroxide Fusion ICP
Pr, Praseodymium (ppm) 7.15 0.90 6.04 8.26 Peroxide Fusion ICP
Rb, Rubidium (ppm) 14.6 0.80 13.5 15.8 Peroxide Fusion ICP
S, Sulphur (wt.%) 27.62 0.615 26.98 28.26 Peroxide Fusion ICP
Sb, Antimony (ppm) 614 30 571 658 Peroxide Fusion ICP
Si, Silicon (wt.%) 3.79 0.173 3.62 3.96 Peroxide Fusion ICP
Sm, Samarium (ppm) 2.97 0.198 2.56 3.39 Peroxide Fusion ICP
Sn, Tin (ppm) 44.3 5.9 37.1 51.6 Peroxide Fusion ICP
Sr, Strontium (ppm) 78 4.8 73 83 Peroxide Fusion ICP
Th, Thorium (ppm) 2.51 0.201 2.22 2.80 Peroxide Fusion ICP
Ti, Titanium (wt.%) 0.070 0.002 0.067 0.074 Peroxide Fusion ICP
Tl, Thallium (ppm) 3.59 0.135 3.34 3.84 Peroxide Fusion ICP
U, Uranium (ppm) 4.26 0.191 3.86 4.65 Peroxide Fusion ICP
V, Vanadium (ppm) 22.3 2.7 18.8 25.8 Peroxide Fusion ICP
W, Tungsten (ppm) 26.6 3.0 21.8 31.4 Peroxide Fusion ICP
Y, Yttrium (ppm) 7.13 1.13 5.77 8.50 Peroxide Fusion ICP
Yb, Ytterbium (ppm) 0.64 0.11 0.46 0.83 Peroxide Fusion ICP
Zn, Zinc (wt.%) 1.18 0.035 1.13 1.23 Peroxide Fusion ICP
F, Fluorine (ppm) 157 25 132 182 Ion Selective Electrode
Downloads
Certificate DataPack SDS NRAM (412 KB)
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