OREAS 996
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Description
Description
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 |
