OREAS 22i

OREAS 22i has been prepared from quartz sand to which 0.5% iron oxide has been added to produce a pale grey pulp. This colouring gives the material an appearance of primary origin (i.e. non-oxide). It is characterised by extremely low background gold of less than 1 ppb (parts per billion; 1 x 10-9) ≡ µg/kg.
Analyte Certified Value 1SD Expanded Uncertainty Low Expanded Uncertainty High Method
Au, Gold (ppb) < 1.0 IND IND IND Pb Fire Assay
Al, Aluminium (wt.%) 0.095 0.007 0.088 0.102 4-Acid Digestion
Ba, Barium (ppm) 4.94 1.05 3.44 6.44 4-Acid Digestion
Be, Beryllium (ppm) 0.065 0.006 0.053 0.077 4-Acid Digestion
Ca, Calcium (wt.%) 0.011 0.001 0.010 0.011 4-Acid Digestion
Cd, Cadmium (ppm) < 0.020 IND IND IND 4-Acid Digestion
Ce, Cerium (ppm) 1.89 0.142 1.69 2.10 4-Acid Digestion
Co, Cobalt (ppm) 0.70 0.08 0.61 0.80 4-Acid Digestion
Cr, Chromium (ppm) 8.64 1.86 6.24 11.04 4-Acid Digestion
Cs, Caesium (ppm) 0.093 0.009 0.082 0.105 4-Acid Digestion
Cu, Copper (ppm) 7.17 0.656 6.41 7.93 4-Acid Digestion
Fe, Iron (wt.%) 0.386 0.021 0.364 0.409 4-Acid Digestion
Ga, Gallium (ppm) 0.21 0.02 0.18 0.23 4-Acid Digestion
Hf, Hafnium (ppm) 0.20 0.008 0.20 0.21 4-Acid Digestion
In, Indium (ppm) < 0.005 IND IND IND 4-Acid Digestion
K, Potassium (wt.%) < 0.010 IND IND IND 4-Acid Digestion
La, Lanthanum (ppm) 0.92 0.071 0.77 1.07 4-Acid Digestion
Li, Lithium (ppm) 16.3 0.84 15.6 17.1 4-Acid Digestion
Mg, Magnesium (wt.%) < 0.010 IND IND IND 4-Acid Digestion
Mn, Manganese (wt.%) 0.010 0.000 0.010 0.011 4-Acid Digestion
Mo, Molybdenum (ppm) 0.65 0.07 0.54 0.75 4-Acid Digestion
Nb, Niobium (ppm) 0.49 0.06 0.43 0.56 4-Acid Digestion
Ni, Nickel (ppm) 4.35 0.306 4.05 4.65 4-Acid Digestion
P, Phosphorus (wt.%) < 0.005 IND IND IND 4-Acid Digestion
Rb, Rubidium (ppm) 0.35 0.05 0.28 0.43 4-Acid Digestion
Re, Rhenium (ppm) < 0.002 IND IND IND 4-Acid Digestion
S, Sulphur (wt.%) < 0.010 IND IND IND 4-Acid Digestion
Sb, Antimony (ppm) 0.16 0.04 0.12 0.19 4-Acid Digestion
Sc, Scandium (ppm) 0.15 0.05 0.04 0.25 4-Acid Digestion
Se, Selenium (ppm) < 1.00 IND IND IND 4-Acid Digestion
Sn, Tin (ppm) 0.45 0.10 0.37 0.53 4-Acid Digestion
Sr, Strontium (ppm) 0.82 0.08 0.70 0.93 4-Acid Digestion
Ta, Tantalum (ppm) < 0.10 IND IND IND 4-Acid Digestion
Te, Tellurium (ppm) < 0.050 IND IND IND 4-Acid Digestion
Th, Thorium (ppm) 0.64 0.041 0.53 0.75 4-Acid Digestion
Ti, Titanium (wt.%) 0.020 0.000 0.019 0.021 4-Acid Digestion
Tl, Thallium (ppm) < 0.020 IND IND IND 4-Acid Digestion
U, Uranium (ppm) 0.11 0.02 0.10 0.13 4-Acid Digestion
V, Vanadium (ppm) 2.00 0.21 1.59 2.41 4-Acid Digestion
W, Tungsten (ppm) 0.100 0.000 0.100 0.100 4-Acid Digestion
Y, Yttrium (ppm) 0.58 0.09 0.48 0.69 4-Acid Digestion
Zn, Zinc (ppm) 6.28 0.74 5.47 7.09 4-Acid Digestion
Zr, Zirconium (ppm) 6.77 0.457 6.08 7.45 4-Acid Digestion
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