OREAS 413

OREAS 413 is a certified reference material composed of magnetite iron ore, obtained from the Hawks Nest Magnetite Project under an exploration license with Peak Iron Mines. The CRM contains approximately 43% Quartz, 35 % magnetite and 19 % hematite. The project site is situated approximately 120 kilometres south of Coober Pedy in South Australia.

The certification program includes:

  • Lithium borate fusion extended iron ore suite package with X-ray fluorescence
  • Thermogravimetry: Loss on ignition (LOI) by multi-point TGA at 371 °C, 425 °C, 650 °C and 1000 °C on dry sample basis
  • 4-acid digestion (HNO3-HF-HClO4-HCl) with full suite ICP-OES and ICP-MS elemental packages
  • Acid digestion (HF/H2SO4) with titration to determine FeO (Fe2+ expressed as FeO)
  • Satmagan 135 analysis to determine magnetic susceptibility (reported as the theoretical Fe3O4 content)
  • Davis Tube Recovery (DTR) using a 20-30g sample size to determine magnetic content and reported as the ‘Mass Recovered’ (MassRec)
  • Gas/liquid pycnometer analysis to determine Specific Gravity

 

Analyte Certified Value 1SD Expanded Uncertainty Low Expanded Uncertainty High Method
Fe, Iron (wt.%) 43.04 0.188 42.83 43.26 Borate Fusion XRF
FeO, Iron(II) oxide (wt.%) 12.32 0.522 11.96 12.67 Classical Wet Chemistry
Fe3O4, Iron(II,III) oxide (wt.%) 31.81 0.882 30.20 33.43 Satmagan 135
Al2O3, Aluminium(III) oxide (wt.%) 0.615 0.026 0.598 0.633 Borate Fusion XRF
As, Arsenic (ppm) 25.6 5.6 14.5 36.6 Borate Fusion XRF
Ba, Barium (ppm) < 10.0 IND IND IND Borate Fusion XRF
CaO, Calcium oxide (wt.%) 0.290 0.009 0.283 0.298 Borate Fusion XRF
Cl, Chlorine (ppm) 153 29 95 210 Borate Fusion XRF
Fe(Calc), Iron normalised to 100% (wt.%) 42.86 0.247 42.66 43.05 Borate Fusion XRF
K2O, Potassium oxide (wt.%) 0.025 0.005 0.022 0.027 Borate Fusion XRF
MgO, Magnesium oxide (wt.%) 0.277 0.016 0.265 0.289 Borate Fusion XRF
Mn, Manganese (wt.%) 0.060 0.004 0.057 0.062 Borate Fusion XRF
P, Phosphorus (wt.%) 0.078 0.002 0.077 0.080 Borate Fusion XRF
Pb, Lead (ppm) < 10.0 IND IND IND Borate Fusion XRF
S, Sulphur (wt.%) 0.224 0.010 0.218 0.231 Borate Fusion XRF
SiO2, Silicon dioxide (wt.%) 36.98 0.301 36.75 37.21 Borate Fusion XRF
Zn, Zinc (ppm) 29.6 5.5 18.4 40.8 Borate Fusion XRF
LOI1000, Loss on ignition @1000 °C (wt.%) -0.283 0.077 -0.372 -0.194 Thermogravimetry
LOI371, Loss on ignition @371 °C (wt.%) -0.274 0.062 -0.329 -0.220 Thermogravimetry
LOI425, Loss on ignition @425 °C (wt.%) -0.459 0.077 -0.529 -0.390 Thermogravimetry
LOI650, Loss on ignition @650 °C (wt.%) -0.723 0.077 -0.785 -0.661 Thermogravimetry
Ag, Silver (ppm) 0.186 0.016 0.160 0.212 4-Acid Digestion
Al, Aluminium (wt.%) 0.332 0.010 0.322 0.341 4-Acid Digestion
As, Arsenic (ppm) 23.1 1.21 22.1 24.2 4-Acid Digestion
Ba, Barium (ppm) 17.8 0.88 16.5 19.0 4-Acid Digestion
Be, Beryllium (ppm) 1.04 0.066 1.00 1.08 4-Acid Digestion
Bi, Bismuth (ppm) 0.33 0.016 0.32 0.34 4-Acid Digestion
Ca, Calcium (wt.%) 0.208 0.013 0.198 0.219 4-Acid Digestion
Ce, Cerium (ppm) 12.1 0.58 11.4 12.7 4-Acid Digestion
Co, Cobalt (ppm) 14.5 0.38 13.8 15.3 4-Acid Digestion
Cr, Chromium (ppm) 32.6 4.4 29.6 35.6 4-Acid Digestion
Cs, Caesium (ppm) 0.17 0.010 0.16 0.19 4-Acid Digestion
Cu, Copper (ppm) 30.5 0.89 29.0 31.9 4-Acid Digestion
Dy, Dysprosium (ppm) 1.17 0.081 1.05 1.30 4-Acid Digestion
Er, Erbium (ppm) 0.68 0.044 0.62 0.74 4-Acid Digestion
Eu, Europium (ppm) 0.43 0.030 0.38 0.48 4-Acid Digestion
Fe, Iron (wt.%) 42.37 1.506 41.34 43.40 4-Acid Digestion
Ga, Gallium (ppm) 2.07 0.140 1.93 2.20 4-Acid Digestion
Gd, Gadolinium (ppm) 1.23 0.048 1.15 1.30 4-Acid Digestion
Ge, Germanium (ppm) 0.38 0.08 0.28 0.47 4-Acid Digestion
Hf, Hafnium (ppm) 0.20 0.03 0.17 0.23 4-Acid Digestion
In, Indium (ppm) 0.095 0.009 0.084 0.107 4-Acid Digestion
K, Potassium (wt.%) 0.020 0.000 0.020 0.021 4-Acid Digestion
La, Lanthanum (ppm) 7.24 0.366 6.91 7.57 4-Acid Digestion
Li, Lithium (ppm) 11.4 0.79 10.8 12.0 4-Acid Digestion
Mg, Magnesium (wt.%) 0.160 0.012 0.152 0.167 4-Acid Digestion
Mn, Manganese (wt.%) 0.058 0.003 0.056 0.060 4-Acid Digestion
Mo, Molybdenum (ppm) 8.04 0.450 7.61 8.46 4-Acid Digestion
Na, Sodium (wt.%) 0.017 0.004 0.014 0.019 4-Acid Digestion
Nb, Niobium (ppm) 16.5 0.62 15.9 17.2 4-Acid Digestion
Nd, Neodymium (ppm) 5.43 0.286 5.12 5.74 4-Acid Digestion
Ni, Nickel (ppm) 22.6 0.77 21.7 23.4 4-Acid Digestion
P, Phosphorus (wt.%) 0.077 0.004 0.073 0.080 4-Acid Digestion
Pb, Lead (ppm) 7.19 0.663 6.50 7.88 4-Acid Digestion
Pr, Praseodymium (ppm) 1.38 0.073 1.24 1.53 4-Acid Digestion
Rb, Rubidium (ppm) 1.33 0.080 1.24 1.42 4-Acid Digestion
Re, Rhenium (ppm) 0.003 0.001 0.002 0.004 4-Acid Digestion
S, Sulphur (wt.%) 0.226 0.007 0.218 0.233 4-Acid Digestion
Sb, Antimony (ppm) 7.67 0.607 7.24 8.11 4-Acid Digestion
Sc, Scandium (ppm) 0.82 0.056 0.73 0.90 4-Acid Digestion
Se, Selenium (ppm) 0.94 0.12 0.77 1.11 4-Acid Digestion
Sn, Tin (ppm) 13.8 0.94 12.7 14.9 4-Acid Digestion
Sr, Strontium (ppm) 10.1 0.53 9.6 10.5 4-Acid Digestion
Ta, Tantalum (ppm) 0.28 0.017 0.26 0.30 4-Acid Digestion
Te, Tellurium (ppm) < 0.050 IND IND IND 4-Acid Digestion
Th, Thorium (ppm) 0.73 0.043 0.69 0.77 4-Acid Digestion
Ti, Titanium (wt.%) 0.012 0.001 0.011 0.013 4-Acid Digestion
Tl, Thallium (ppm) 0.051 0.005 0.040 0.062 4-Acid Digestion
U, Uranium (ppm) 2.24 0.092 2.13 2.34 4-Acid Digestion
V, Vanadium (ppm) 16.5 1.9 14.9 18.1 4-Acid Digestion
W, Tungsten (ppm) 25.5 2.08 23.9 27.2 4-Acid Digestion
Y, Yttrium (ppm) 8.68 0.483 8.26 9.10 4-Acid Digestion
Zn, Zinc (ppm) 27.8 1.78 26.3 29.3 4-Acid Digestion
Zr, Zirconium (ppm) 7.35 0.187 7.06 7.64 4-Acid Digestion
MassRec, Mass recovered (wt.%) 35.66 1.661 34.12 37.20 Davis Tube Recovery
SG, Specific Gravity (Unity) 3.76 0.130 3.67 3.85 Gas / Liquid Pycnometry
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