OREAS 135b

OREAS 135b has been prepared from a blend of black slate and Zn-Pb-Ag ores from the Dugald River and Cannington deposits located in Northern Queensland, Australia.
Twenty-six commercial analytical laboratories participated in the program to certify:

  • Majors & base metals by oxidising fusion with X-ray fluorescence finish;
  • Loss on ignition at 1000° Celsius;
  • Total Sulphur by infrared combustion furnace or C/S analyser;
  • Full ICP-OES and MS elemental suites by peroxide fusion;
  • Full ICP-OES and MS elemental suites by 4-acid (HNO3-HF-HClO4-HCl) digestion;
  • Full ICP-OES and MS elemental suites by aqua regia digestion.
Analyte Certified Value 1SD Expanded Uncertainty Low Expanded Uncertainty High Method
Zn, Zinc (wt.%) 2.73 0.110 2.66 2.80 4-Acid Digestion
Pb, Lead (wt.%) 1.71 0.061 1.66 1.76 4-Acid Digestion
Ag, Silver (ppm) 52.9 2.75 50.6 55.1 4-Acid Digestion
Al2O3, Aluminium(III) oxide (wt.%) 11.14 0.292 10.96 11.32 Borate Fusion XRF
As, Arsenic (ppm) 751 121 644 858 Borate Fusion XRF
BaO, Barium oxide (wt.%) 0.393 0.025 0.376 0.409 Borate Fusion XRF
CaO, Calcium oxide (wt.%) 0.665 0.021 0.650 0.680 Borate Fusion XRF
Cu, Copper (ppm) 131 31 108 153 Borate Fusion XRF
Fe, Iron (wt.%) 5.41 0.102 5.34 5.49 Borate Fusion XRF
K2O, Potassium oxide (wt.%) 3.04 0.103 2.98 3.10 Borate Fusion XRF
MgO, Magnesium oxide (wt.%) 0.636 0.033 0.609 0.662 Borate Fusion XRF
Mn, Manganese (wt.%) 0.339 0.011 0.330 0.347 Borate Fusion XRF
Na2O, Sodium oxide (wt.%) 0.158 0.039 0.109 0.207 Borate Fusion XRF
P2O5, Phosphorus(V) oxide (wt.%) 0.100 0.009 0.093 0.108 Borate Fusion XRF
Pb, Lead (wt.%) 1.72 0.071 1.68 1.76 Borate Fusion XRF
S, Sulphur (wt.%) 3.10 0.120 3.01 3.19 Borate Fusion XRF
SiO2, Silicon dioxide (wt.%) 64.01 0.934 63.41 64.62 Borate Fusion XRF
TiO2, Titanium dioxide (wt.%) 0.463 0.012 0.450 0.477 Borate Fusion XRF
Zn, Zinc (wt.%) 2.77 0.077 2.72 2.82 Borate Fusion XRF
LOI1000, Loss On Ignition @1000 °C (wt.%) 5.22 0.179 5.08 5.36 Thermogravimetry
C, Carbon (wt.%) 1.14 0.050 1.12 1.17 Infrared Combustion
S, Sulphur (wt.%) 3.14 0.103 3.08 3.20 Infrared Combustion
Ag, Silver (ppm) 54.8 3.26 49.7 59.9 Borate / Peroxide Fusion ICP
Al, Aluminium (wt.%) 5.95 0.120 5.81 6.08 Borate / Peroxide Fusion ICP
As, Arsenic (ppm) 708 69 644 771 Borate / Peroxide Fusion ICP
B, Boron (ppm) 106 15 79 133 Borate / Peroxide Fusion ICP
Ba, Barium (wt.%) 0.357 0.019 0.342 0.372 Borate / Peroxide Fusion ICP
Be, Beryllium (ppm) 2.70 0.56 2.16 3.24 Borate / Peroxide Fusion ICP
Bi, Bismuth (ppm) 2.71 0.63 2.05 3.37 Borate / Peroxide Fusion ICP
Ca, Calcium (wt.%) 0.474 0.060 0.430 0.518 Borate / Peroxide Fusion ICP
Cd, Cadmium (ppm) 69 7 62 76 Borate / Peroxide Fusion ICP
Ce, Cerium (ppm) 91 4.8 86 95 Borate / Peroxide Fusion ICP
Co, Cobalt (ppm) 7.33 1.15 5.88 8.77 Borate / Peroxide Fusion ICP
Cr, Chromium (ppm) 104 31 86 122 Borate / Peroxide Fusion ICP
Cs, Caesium (ppm) 3.89 0.339 3.57 4.20 Borate / Peroxide Fusion ICP
Cu, Copper (ppm) 112 20 98 126 Borate / Peroxide Fusion ICP
Dy, Dysprosium (ppm) 5.30 0.333 4.80 5.79 Borate / Peroxide Fusion ICP
Er, Erbium (ppm) 2.92 0.216 2.60 3.23 Borate / Peroxide Fusion ICP
Eu, Europium (ppm) 2.13 0.172 1.91 2.34 Borate / Peroxide Fusion ICP
Fe, Iron (wt.%) 5.46 0.217 5.30 5.62 Borate / Peroxide Fusion ICP
Ga, Gallium (ppm) 18.1 1.9 16.5 19.8 Borate / Peroxide Fusion ICP
Gd, Gadolinium (ppm) 6.48 0.500 5.61 7.34 Borate / Peroxide Fusion ICP
Ge, Germanium (ppm) 3.26 0.75 2.18 4.34 Borate / Peroxide Fusion ICP
Hf, Hafnium (ppm) 2.74 0.71 1.83 3.64 Borate / Peroxide Fusion ICP
Ho, Holmium (ppm) 0.97 0.11 0.85 1.09 Borate / Peroxide Fusion ICP
In, Indium (ppm) 0.71 0.07 0.58 0.83 Borate / Peroxide Fusion ICP
K, Potassium (wt.%) 2.57 0.120 2.47 2.67 Borate / Peroxide Fusion ICP
La, Lanthanum (ppm) 44.9 3.75 42.4 47.4 Borate / Peroxide Fusion ICP
Li, Lithium (ppm) 22.3 2.04 19.9 24.7 Borate / Peroxide Fusion ICP
Lu, Lutetium (ppm) 0.37 0.04 0.28 0.46 Borate / Peroxide Fusion ICP
Mg, Magnesium (wt.%) 0.368 0.015 0.353 0.384 Borate / Peroxide Fusion ICP
Mn, Manganese (wt.%) 0.341 0.012 0.328 0.353 Borate / Peroxide Fusion ICP
Mo, Molybdenum (ppm) 6.97 2.49 3.65 10.28 Borate / Peroxide Fusion ICP
Nb, Niobium (ppm) 10.3 2.0 8.7 11.9 Borate / Peroxide Fusion ICP
Nd, Neodymium (ppm) 38.7 2.15 36.0 41.4 Borate / Peroxide Fusion ICP
Ni, Nickel (ppm) 21.3 7.1 8.8 33.7 Borate / Peroxide Fusion ICP
P, Phosphorus (wt.%) 0.045 0.004 0.038 0.053 Borate / Peroxide Fusion ICP
Pb, Lead (wt.%) 1.68 0.069 1.61 1.74 Borate / Peroxide Fusion ICP
Pr, Praseodymium (ppm) 10.5 0.64 9.6 11.3 Borate / Peroxide Fusion ICP
Rb, Rubidium (ppm) 140 11 130 149 Borate / Peroxide Fusion ICP
S, Sulphur (wt.%) 3.06 0.126 2.96 3.17 Borate / Peroxide Fusion ICP
Sb, Antimony (ppm) 40.9 2.59 36.5 45.3 Borate / Peroxide Fusion ICP
Sc, Scandium (ppm) 9.46 0.927 8.02 10.89 Borate / Peroxide Fusion ICP
Si, Silicon (wt.%) 30.68 1.344 29.65 31.71 Borate / Peroxide Fusion ICP
Sm, Samarium (ppm) 7.25 0.699 6.63 7.88 Borate / Peroxide Fusion ICP
Sr, Strontium (ppm) 125 7 117 132 Borate / Peroxide Fusion ICP
Ta, Tantalum (ppm) 0.92 0.12 0.61 1.23 Borate / Peroxide Fusion ICP
Tb, Terbium (ppm) 0.92 0.090 0.77 1.06 Borate / Peroxide Fusion ICP
Th, Thorium (ppm) 12.8 0.78 12.2 13.5 Borate / Peroxide Fusion ICP
Ti, Titanium (wt.%) 0.276 0.011 0.265 0.287 Borate / Peroxide Fusion ICP
Tl, Thallium (ppm) 5.47 0.393 4.93 6.02 Borate / Peroxide Fusion ICP
Tm, Thulium (ppm) 0.40 0.04 0.31 0.49 Borate / Peroxide Fusion ICP
U, Uranium (ppm) 5.26 0.384 4.68 5.85 Borate / Peroxide Fusion ICP
V, Vanadium (ppm) 147 8 142 151 Borate / Peroxide Fusion ICP
W, Tungsten (ppm) 3.37 0.59 2.42 4.32 Borate / Peroxide Fusion ICP
Y, Yttrium (ppm) 29.0 3.4 26.1 31.9 Borate / Peroxide Fusion ICP
Yb, Ytterbium (ppm) 2.69 0.143 2.40 2.98 Borate / Peroxide Fusion ICP
Zn, Zinc (wt.%) 2.71 0.083 2.63 2.79 Borate / Peroxide Fusion ICP
Zr, Zirconium (ppm) 96 13 75 117 Borate / Peroxide Fusion ICP
Al, Aluminium (wt.%) 5.81 0.244 5.63 5.99 4-Acid Digestion
As, Arsenic (ppm) 707 42 668 746 4-Acid Digestion
Be, Beryllium (ppm) 2.45 0.25 2.30 2.60 4-Acid Digestion
Bi, Bismuth (ppm) 2.66 0.083 2.56 2.76 4-Acid Digestion
Ca, Calcium (wt.%) 0.481 0.024 0.467 0.496 4-Acid Digestion
Cd, Cadmium (ppm) 69 4.3 67 71 4-Acid Digestion
Ce, Cerium (ppm) 86 9 80 92 4-Acid Digestion
Co, Cobalt (ppm) 6.26 0.68 5.63 6.89 4-Acid Digestion
Cr, Chromium (ppm) 76 6.9 72 80 4-Acid Digestion
Cs, Caesium (ppm) 3.76 0.330 3.52 3.99 4-Acid Digestion
Cu, Copper (ppm) 114 6 109 119 4-Acid Digestion
Dy, Dysprosium (ppm) 4.35 0.56 3.84 4.86 4-Acid Digestion
Er, Erbium (ppm) 2.04 0.34 1.73 2.35 4-Acid Digestion
Eu, Europium (ppm) 2.06 0.141 1.88 2.24 4-Acid Digestion
Fe, Iron (wt.%) 5.36 0.243 5.20 5.51 4-Acid Digestion
Ga, Gallium (ppm) 18.3 1.41 17.2 19.3 4-Acid Digestion
Gd, Gadolinium (ppm) 5.87 0.470 5.33 6.40 4-Acid Digestion
Hf, Hafnium (ppm) 2.12 0.190 1.93 2.30 4-Acid Digestion
Ho, Holmium (ppm) 0.77 0.12 0.67 0.88 4-Acid Digestion
In, Indium (ppm) 0.69 0.066 0.60 0.77 4-Acid Digestion
K, Potassium (wt.%) 2.52 0.107 2.44 2.60 4-Acid Digestion
La, Lanthanum (ppm) 41.0 7.0 37.0 44.9 4-Acid Digestion
Li, Lithium (ppm) 21.0 1.37 19.7 22.2 4-Acid Digestion
Lu, Lutetium (ppm) 0.29 0.04 0.25 0.33 4-Acid Digestion
Mg, Magnesium (wt.%) 0.357 0.020 0.344 0.370 4-Acid Digestion
Mn, Manganese (wt.%) 0.326 0.018 0.313 0.340 4-Acid Digestion
Mo, Molybdenum (ppm) 4.14 0.49 3.68 4.59 4-Acid Digestion
Na, Sodium (wt.%) 0.095 0.009 0.087 0.103 4-Acid Digestion
Nd, Neodymium (ppm) 36.3 2.72 33.8 38.8 4-Acid Digestion
Ni, Nickel (ppm) 14.9 1.27 13.2 16.6 4-Acid Digestion
P, Phosphorus (wt.%) 0.044 0.002 0.042 0.045 4-Acid Digestion
Pr, Praseodymium (ppm) 9.63 0.717 9.00 10.26 4-Acid Digestion
Rb, Rubidium (ppm) 137 8 129 144 4-Acid Digestion
S, Sulphur (wt.%) 3.03 0.114 2.94 3.12 4-Acid Digestion
Sb, Antimony (ppm) 37.6 3.18 34.3 40.9 4-Acid Digestion
Sc, Scandium (ppm) 10.3 0.54 9.5 11.0 4-Acid Digestion
Se, Selenium (ppm) 2.79 0.46 1.71 3.87 4-Acid Digestion
Sm, Samarium (ppm) 7.28 0.80 6.62 7.94 4-Acid Digestion
Sn, Tin (ppm) 4.02 0.354 3.63 4.41 4-Acid Digestion
Sr, Strontium (ppm) 114 8 109 119 4-Acid Digestion
Tb, Terbium (ppm) 0.80 0.10 0.70 0.89 4-Acid Digestion
Te, Tellurium (ppm) 0.20 0.08 0.09 0.31 4-Acid Digestion
Th, Thorium (ppm) 12.3 1.06 11.5 13.1 4-Acid Digestion
Ti, Titanium (wt.%) 0.189 0.037 0.168 0.209 4-Acid Digestion
Tl, Thallium (ppm) 5.65 0.348 5.38 5.92 4-Acid Digestion
Tm, Thulium (ppm) 0.29 0.05 0.24 0.34 4-Acid Digestion
U, Uranium (ppm) 5.06 0.396 4.73 5.38 4-Acid Digestion
V, Vanadium (ppm) 141 5 136 147 4-Acid Digestion
W, Tungsten (ppm) 3.17 0.48 2.72 3.62 4-Acid Digestion
Y, Yttrium (ppm) 21.1 2.9 18.7 23.5 4-Acid Digestion
Yb, Ytterbium (ppm) 1.90 0.29 1.62 2.17 4-Acid Digestion
Zr, Zirconium (ppm) 67 6.0 63 71 4-Acid Digestion
Ag, Silver (ppm) 53.5 1.34 51.6 55.3 Aqua Regia Digestion
Al, Aluminium (wt.%) 1.05 0.17 0.96 1.14 Aqua Regia Digestion
As, Arsenic (ppm) 707 47 680 733 Aqua Regia Digestion
Be, Beryllium (ppm) 0.74 0.14 0.65 0.82 Aqua Regia Digestion
Bi, Bismuth (ppm) 2.50 0.181 2.34 2.66 Aqua Regia Digestion
Ca, Calcium (wt.%) 0.425 0.016 0.412 0.438 Aqua Regia Digestion
Cd, Cadmium (ppm) 67 2.6 65 69 Aqua Regia Digestion
Ce, Cerium (ppm) 68 8 62 74 Aqua Regia Digestion
Co, Cobalt (ppm) 5.59 0.73 5.21 5.97 Aqua Regia Digestion
Cr, Chromium (ppm) 29.7 2.37 28.0 31.3 Aqua Regia Digestion
Cs, Caesium (ppm) 1.43 0.114 1.33 1.54 Aqua Regia Digestion
Cu, Copper (ppm) 116 6 112 120 Aqua Regia Digestion
Dy, Dysprosium (ppm) 2.35 0.38 1.97 2.74 Aqua Regia Digestion
Er, Erbium (ppm) 0.99 0.13 0.84 1.14 Aqua Regia Digestion
Eu, Europium (ppm) 1.40 0.135 1.24 1.56 Aqua Regia Digestion
Fe, Iron (wt.%) 5.10 0.201 4.98 5.22 Aqua Regia Digestion
Ga, Gallium (ppm) 4.48 0.82 3.91 5.04 Aqua Regia Digestion
Gd, Gadolinium (ppm) 4.01 0.56 3.43 4.59 Aqua Regia Digestion
Hf, Hafnium (ppm) 0.56 0.08 0.50 0.62 Aqua Regia Digestion
Hg, Mercury (ppm) 0.91 0.067 0.83 0.98 Aqua Regia Digestion
Ho, Holmium (ppm) 0.39 0.06 0.33 0.45 Aqua Regia Digestion
In, Indium (ppm) 0.63 0.060 0.58 0.68 Aqua Regia Digestion
K, Potassium (wt.%) 0.328 0.061 0.297 0.359 Aqua Regia Digestion
La, Lanthanum (ppm) 29.5 4.7 26.5 32.4 Aqua Regia Digestion
Li, Lithium (ppm) 5.37 1.16 4.43 6.31 Aqua Regia Digestion
Lu, Lutetium (ppm) 0.11 0.02 0.10 0.13 Aqua Regia Digestion
Mg, Magnesium (wt.%) 0.118 0.012 0.108 0.127 Aqua Regia Digestion
Mn, Manganese (wt.%) 0.293 0.017 0.284 0.303 Aqua Regia Digestion
Mo, Molybdenum (ppm) 3.86 0.40 3.58 4.13 Aqua Regia Digestion
Nd, Neodymium (ppm) 25.8 3.3 22.3 29.2 Aqua Regia Digestion
Ni, Nickel (ppm) 13.0 1.13 12.2 13.8 Aqua Regia Digestion
P, Phosphorus (wt.%) 0.041 0.002 0.039 0.042 Aqua Regia Digestion
Pb, Lead (wt.%) 1.69 0.037 1.66 1.73 Aqua Regia Digestion
Pr, Praseodymium (ppm) 6.84 1.03 5.64 8.04 Aqua Regia Digestion
Rb, Rubidium (ppm) 23.5 5.4 20.0 27.0 Aqua Regia Digestion
S, Sulphur (wt.%) 3.08 0.150 2.99 3.18 Aqua Regia Digestion
Sb, Antimony (ppm) 29.9 4.3 27.4 32.3 Aqua Regia Digestion
Sc, Scandium (ppm) 1.95 0.38 1.62 2.29 Aqua Regia Digestion
Se, Selenium (ppm) 2.71 0.56 2.11 3.31 Aqua Regia Digestion
Sm, Samarium (ppm) 4.86 0.72 4.14 5.58 Aqua Regia Digestion
Sn, Tin (ppm) 1.65 0.20 1.48 1.81 Aqua Regia Digestion
Sr, Strontium (ppm) 26.2 2.7 24.9 27.6 Aqua Regia Digestion
Tb, Terbium (ppm) 0.53 0.06 0.46 0.60 Aqua Regia Digestion
Te, Tellurium (ppm) 0.15 0.03 0.11 0.20 Aqua Regia Digestion
Th, Thorium (ppm) 9.29 1.09 8.59 9.99 Aqua Regia Digestion
Ti, Titanium (wt.%) 0.010 0.001 0.010 0.011 Aqua Regia Digestion
Tl, Thallium (ppm) 1.22 0.17 1.11 1.34 Aqua Regia Digestion
Tm, Thulium (ppm) 0.12 0.02 0.09 0.15 Aqua Regia Digestion
U, Uranium (ppm) 3.51 0.223 3.30 3.71 Aqua Regia Digestion
V, Vanadium (ppm) 28.1 4.7 25.6 30.5 Aqua Regia Digestion
W, Tungsten (ppm) 1.34 0.23 1.14 1.53 Aqua Regia Digestion
Y, Yttrium (ppm) 10.5 0.62 9.9 11.0 Aqua Regia Digestion
Yb, Ytterbium (ppm) 0.78 0.14 0.59 0.96 Aqua Regia Digestion
Zn, Zinc (wt.%) 2.73 0.075 2.66 2.79 Aqua Regia Digestion
Zr, Zirconium (ppm) 17.1 2.1 15.8 18.5 Aqua Regia Digestion
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