| Description: OREAS 21f has been prepared from quartz sand to which 0.5% iron oxide has been added to produce a pinkish-tan coloured pulp. This colouring gives the material an appearance of oxide origin (i.e., light orange-brown clay or light iron ore colour). It is characterised by extremely low background gold of less than 1 part per billion.
Ten commercial analytical laboratories participated in the program to characterise the elements reported below. The following methods were employed: - Au by low level (1ppb reading resolution) fire assay with ICP-OES or ICP-MS finish;
- Full ICP-OES and ICP-MS elemental suites by 4-acid (HF-HNO3-HCl-HClO4) digestion.
Download Certificate OREAS21f Download DataPack OREAS21f | Analyte | Certified Value | 1SD | 95% CI Low | 95% CI High | Method |
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| Ag, Silver (ppm) | 0.05 | IND | IND | IND | 4-Acid Digestion | | Al, Aluminium (wt.%) | 0.099 | 0.008 | 0.093 | 0.105 | 4-Acid Digestion | | Ba, Barium (ppm) | 4.58 | 1.32 | 3.4 | 5.76 | 4-Acid Digestion | | Be, Beryllium (ppm) | 0.061 | 0.019 | 0.053 | 0.069 | 4-Acid Digestion | | Bi, Bismuth (ppm) | 0.01 | IND | IND | IND | 4-Acid Digestion | | Cd, Cadmium (ppm) | 0.02 | IND | IND | IND | 4-Acid Digestion | | Ce, Cerium (ppm) | 1.79 | 0.172 | 1.69 | 1.88 | 4-Acid Digestion | | Co, Cobalt (ppm) | 0.41 | 0.05 | 0.4 | 0.43 | 4-Acid Digestion | | Cr, Chromium (ppm) | 5.39 | 0.98 | 4.46 | 6.32 | 4-Acid Digestion | | Cs, Caesium (ppm) | 0.09 | 0.005 | 0.086 | 0.094 | 4-Acid Digestion | | Cu, Copper (ppm) | 4.9 | 0.51 | 4.54 | 5.26 | 4-Acid Digestion | | Fe, Iron (wt.%) | 0.35 | 0.019 | 0.337 | 0.363 | 4-Acid Digestion | | Ga, Gallium (ppm) | 0.22 | 0.04 | 0.19 | 0.26 | 4-Acid Digestion | | Hf, Hafnium (ppm) | 0.2 | 0.02 | 0.19 | 0.22 | 4-Acid Digestion | | In, Indium (ppm) | 0.02 | IND | IND | IND | 4-Acid Digestion | | K, Potassium (wt.%) | 0.01 | IND | IND | IND | 4-Acid Digestion | | La, Lanthanum (ppm) | 0.88 | 0.09 | 0.82 | 0.94 | 4-Acid Digestion | | Li, Lithium (ppm) | 15 | 1.1 | 14.1 | 15.8 | 4-Acid Digestion | | Mg, Magnesium (wt.%) | 0.01 | IND | IND | IND | 4-Acid Digestion | | Mn, Manganese (wt.%) | 0.004 | 0 | 0.003 | 0.004 | 4-Acid Digestion | | Mo, Molybdenum (ppm) | 0.48 | 0.06 | 0.45 | 0.5 | 4-Acid Digestion | | Na, Sodium (wt.%) | 0.01 | IND | IND | IND | 4-Acid Digestion | | Nb, Niobium (ppm) | 0.55 | 0.07 | 0.51 | 0.58 | 4-Acid Digestion | | Ni, Nickel (ppm) | 3.33 | 0.65 | 2.96 | 3.7 | 4-Acid Digestion | | P, Phosphorus (wt.%) | 0.01 | IND | IND | IND | 4-Acid Digestion | | Rb, Rubidium (ppm) | 0.28 | 0.07 | 0.23 | 0.33 | 4-Acid Digestion | | Re, Rhenium (ppm) | 0.002 | IND | IND | IND | 4-Acid Digestion | | S, Sulphur (wt.%) | 0.01 | IND | IND | IND | 4-Acid Digestion | | Sb, Antimony (ppm) | 0.14 | 0.04 | 0.1 | 0.17 | 4-Acid Digestion | | Se, Selenium (ppm) | 1 | IND | IND | IND | 4-Acid Digestion | | Sn, Tin (ppm) | 0.4 | 0.14 | 0.29 | 0.5 | 4-Acid Digestion | | Sr, Strontium (ppm) | 0.62 | 0.17 | 0.47 | 0.77 | 4-Acid Digestion | | Ta, Tantalum (ppm) | 0.05 | IND | IND | IND | 4-Acid Digestion | | Te, Tellurium (ppm) | 0.05 | IND | IND | IND | 4-Acid Digestion | | Th, Thorium (ppm) | 0.57 | 0.06 | 0.53 | 0.61 | 4-Acid Digestion | | Ti, Titanium (wt.%) | 0.016 | 0.001 | 0.016 | 0.016 | 4-Acid Digestion | | Tl, Thallium (ppm) | 0.02 | IND | IND | IND | 4-Acid Digestion | | U, Uranium (ppm) | 0.11 | 0.02 | 0.09 | 0.12 | 4-Acid Digestion | | W, Tungsten (ppm) | 0.11 | 0.03 | 0.1 | 0.12 | 4-Acid Digestion | | Y, Yttrium (ppm) | 0.57 | 0.06 | 0.52 | 0.61 | 4-Acid Digestion | | Zn, Zinc (ppm) | 3.28 | 0.78 | 3.1 | 3.46 | 4-Acid Digestion | | Zr, Zirconium (ppm) | 5.91 | 1.05 | 5.15 | 6.67 | 4-Acid Digestion | | Au, Gold (ppb) | 1 | IND | IND | IND | Pb Fire Assay |
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