Description: OREAS 22d has been prepared from quartz sand to which 0.5% iron oxide has been added to produce a pale grey pulp. It is characterised by extremely low background gold of less than 1 parts per billion. Seven commercial analytical laboratories participated in the program to characterise (in addition to gold by fire assay) Ag, Al, As, Ba, Bi, Cd, Co, Cu, Fe, Hf, Li, Mn, Mo, Nb, Ni, Rb, Sb, Sn, Th, Ti, U, V, W, Y, Zn and Zr by 4-acid digestion with ICP-OES or ICP-MS finish. Download Certificate OREAS22d Download DataPack OREAS22d Analyte | Certified Value | 1SD | 95% CI Low | 95% CI High | Method |
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Ag, Silver (ppm) | 0.1 | IND | IND | IND | 4-Acid Digestion | Al, Aluminium (wt.%) | 0.132 | 0.008 | 0.123 | 0.142 | 4-Acid Digestion | As, Arsenic (ppm) | 1 | IND | IND | IND | 4-Acid Digestion | Ba, Barium (ppm) | 6.17 | 0.63 | 5.66 | 6.67 | 4-Acid Digestion | Bi, Bismuth (ppm) | 0.1 | IND | IND | IND | 4-Acid Digestion | Cd, Cadmium (ppm) | 0.1 | IND | IND | IND | 4-Acid Digestion | Co, Cobalt (ppm) | 0.85 | 0.071 | 0.77 | 0.93 | 4-Acid Digestion | Cu, Copper (ppm) | 9.23 | 1.34 | 7.85 | 10.61 | 4-Acid Digestion | Fe, Iron (wt.%) | 0.468 | 0.037 | 0.432 | 0.504 | 4-Acid Digestion | Hf, Hafnium (ppm) | 0.22 | 0.03 | 0.19 | 0.24 | 4-Acid Digestion | Li, Lithium (ppm) | 14.2 | 1.33 | 12.5 | 16 | 4-Acid Digestion | Mn, Manganese (wt.%) | 0.011 | 0.001 | 0.009 | 0.013 | 4-Acid Digestion | Mo, Molybdenum (ppm) | 2.36 | 0.086 | 2.28 | 2.44 | 4-Acid Digestion | Nb, Niobium (ppm) | 0.88 | 0.081 | 0.79 | 0.97 | 4-Acid Digestion | Ni, Nickel (ppm) | 4.38 | 0.63 | 4.05 | 4.7 | 4-Acid Digestion | Pb, Lead (ppm) | 0.72 | 0.26 | 0.49 | 0.95 | 4-Acid Digestion | Rb, Rubidium (ppm) | 0.54 | 0.06 | 0.49 | 0.59 | 4-Acid Digestion | Sb, Antimony (ppm) | 0.21 | 0.03 | 0.19 | 0.22 | 4-Acid Digestion | Sn, Tin (ppm) | 0.61 | 0.013 | 0.59 | 0.62 | 4-Acid Digestion | Th, Thorium (ppm) | 0.67 | 0.1 | 0.55 | 0.78 | 4-Acid Digestion | Ti, Titanium (wt.%) | 0.021 | 0.001 | 0.021 | 0.022 | 4-Acid Digestion | U, Uranium (ppm) | 0.18 | 0.05 | 0.13 | 0.22 | 4-Acid Digestion | V, Vanadium (ppm) | 2.63 | 0.5 | 2.12 | 3.15 | 4-Acid Digestion | W, Tungsten (ppm) | 0.21 | 0.03 | 0.18 | 0.24 | 4-Acid Digestion | Y, Yttrium (ppm) | 0.69 | 0.07 | 0.61 | 0.76 | 4-Acid Digestion | Zn, Zinc (ppm) | 6.7 | 1.31 | 5.59 | 7.81 | 4-Acid Digestion | Zr, Zirconium (ppm) | 7.02 | 0.6 | 6.31 | 7.73 | 4-Acid Digestion | Au, Gold (ppb) | 1 | IND | IND | IND | Pb Fire Assay |
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