| Description: Reference material OREAS 185 is one of a suite of thirteen nickel laterite CRMs (OREAS 182 to OREAS 195) prepared from saprolite ore source materials. These were supplied by Anglo American Brazil Limitada from the Codemin Nickel Mine located in the state of Goiás and ~300 kms from the port of Santos, Brazil. It has been certified for Ni, Co, Al2O3, C, CaO, Cl, Cu, Cr2O3, Fe2O3, K2O, MgO, MnO, Na2O, P2O5, SiO2, S, SO3, TiO2 , Zn and LOI. Nineteen commercial analytical laboratories participated in the certification program with characterization of this suite of 20 analytes by the following methods: - Ni, Co, Al2O3, CaO, Cl, Cu, Cr2O3, Fe2O3, K2O, MgO, MnO, Na2O, P2O5, SiO2, SO3, TiO2 and Zn by lithium borate fusion with X-ray fluorescence (17 laboratories)
- Ni, Co, Al2O3, CaO, Cu, Cr2O3, Fe2O3, K2O, MgO, MnO, Na2O, P2O5, SiO2, SO3, TiO2 and Zn by lithium borate or sodium peroxide fusion with ICP-OES (12 laboratories)
- carbon and sulphur by infra-red combustion furnace (11 laboratories)
- loss on ignition (LOI) at 1000°C (18 laboratories)
Download Certificate OREAS185 Download DataPack OREAS185 | Analyte | Certified Value | 1SD | 95% CI Low | 95% CI High | Method |
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| Al2O3, Aluminium(III) oxide (wt.%) | 2.47 | 0.042 | 2.44 | 2.5 | Borate / Peroxide Fusion ICP | | CaO, Calcium oxide (wt.%) | 0.387 | 0.016 | 0.376 | 0.399 | Borate / Peroxide Fusion ICP | | Co, Cobalt (ppm) | 385 | 19 | 379 | 391 | Borate / Peroxide Fusion ICP | | Cr2O3, Chromium(III) oxide (ppm) | 9103 | 239 | 8961 | 9245 | Borate / Peroxide Fusion ICP | | Fe2O3, Iron(III) oxide (wt.%) | 18.27 | 0.382 | 18.03 | 18.51 | Borate / Peroxide Fusion ICP | | MgO, Magnesium oxide (wt.%) | 20.17 | 0.404 | 19.91 | 20.44 | Borate / Peroxide Fusion ICP | | MnO, Manganese oxide (wt.%) | 0.295 | 0.005 | 0.291 | 0.299 | Borate / Peroxide Fusion ICP | | Na2O, Sodium oxide (wt.%) | 0.024 | 0.004 | 0.021 | 0.027 | Borate / Peroxide Fusion ICP | | Ni, Nickel (wt.%) | 1.12 | 0.024 | 1.11 | 1.13 | Borate / Peroxide Fusion ICP | | SiO2, Silicon dioxide (wt.%) | 45.58 | 0.879 | 45 | 46.16 | Borate / Peroxide Fusion ICP | | TiO2, Titanium dioxide (wt.%) | 0.031 | 0.001 | 0.03 | 0.031 | Borate / Peroxide Fusion ICP | | Al2O3, Aluminium(III) oxide (wt.%) | 2.48 | 0.02 | 2.47 | 2.5 | Borate Fusion XRF | | CaO, Calcium oxide (wt.%) | 0.385 | 0.006 | 0.381 | 0.388 | Borate Fusion XRF | | Co, Cobalt (ppm) | 388 | 10 | 379 | 397 | Borate Fusion XRF | | Cr2O3, Chromium(III) oxide (ppm) | 9137 | 132 | 9070 | 9203 | Borate Fusion XRF | | Fe2O3, Iron(III) oxide (wt.%) | 18.42 | 0.099 | 18.34 | 18.5 | Borate Fusion XRF | | MgO, Magnesium oxide (wt.%) | 20.22 | 0.111 | 20.11 | 20.33 | Borate Fusion XRF | | MnO, Manganese oxide (wt.%) | 0.297 | 0.003 | 0.295 | 0.298 | Borate Fusion XRF | | Ni, Nickel (wt.%) | 1.14 | 0.009 | 1.13 | 1.15 | Borate Fusion XRF | | SiO2, Silicon dioxide (wt.%) | 45.93 | 0.196 | 45.77 | 46.08 | Borate Fusion XRF | | TiO2, Titanium dioxide (wt.%) | 0.033 | 0.005 | 0.03 | 0.036 | Borate Fusion XRF | | Zn, Zinc (ppm) | 143 | 7 | 136 | 150 | Borate Fusion XRF | | C, Carbon (wt.%) | 0.105 | 0.013 | 0.091 | 0.119 | Infrared Combustion | | LOI1000, Loss On Ignition @1000°C (wt.%) | 9.61 | 0.107 | 9.5 | 9.71 | Thermogravimetry |
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