OREAS 191
SKU: 191
Reference material OREAS 191 is one of a suite of thirteen nickel laterite
CRMs (OREAS 182 to OREAS 195) prepared from saprolitic 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)
Specifications
- State: oxide
- Matrix: saprolite
- Mineralisation: lateritic nickel
- CRM Group: Ni laterite ore
Certified Values
| Analyte | Certified Value | 1SD | 95% CL Low | 95% CL High | Method |
|---|---|---|---|---|---|
| Ni, Nickel (wt.%) | 1.75 | 0.017 | 1.74 | 1.77 | Borate Fusion XRF |
| Co, Cobalt (ppm) | 665 | 18 | 655 | 675 | Borate Fusion XRF |
| Fe2O3, Iron(III) oxide (wt.%) | 24.86 | 0.150 | 24.72 | 25.00 | Borate Fusion XRF |
| Al2O3, Aluminium(III) oxide (wt.%) | 4.27 | 0.034 | 4.25 | 4.29 | Borate Fusion XRF |
| CaO, Calcium oxide (wt.%) | 0.276 | 0.005 | 0.273 | 0.279 | Borate Fusion XRF |
| Cr2O3, Chromium(III) oxide (ppm) | 12242 | 114 | 12151 | 12333 | Borate Fusion XRF |
| MgO, Magnesium oxide (wt.%) | 10.06 | 0.076 | 9.99 | 10.12 | Borate Fusion XRF |
| MnO, Manganese oxide (wt.%) | 0.397 | 0.004 | 0.393 | 0.401 | Borate Fusion XRF |
| SiO2, Silicon dioxide (wt.%) | 47.97 | 0.256 | 47.78 | 48.15 | Borate Fusion XRF |
| TiO2, Titanium dioxide (wt.%) | 0.052 | 0.005 | 0.049 | 0.055 | Borate Fusion XRF |
| Zn, Zinc (ppm) | 302 | 8 | 291 | 313 | Borate Fusion XRF |
| Al2O3, Aluminium(III) oxide (wt.%) | 4.19 | 0.076 | 4.14 | 4.24 | Borate / Peroxide Fusion ICP |
| CaO, Calcium oxide (wt.%) | 0.287 | 0.011 | 0.278 | 0.296 | Borate / Peroxide Fusion ICP |
| Co, Cobalt (ppm) | 652 | 25 | 639 | 664 | Borate / Peroxide Fusion ICP |
| Cr2O3, Chromium(III) oxide (ppm) | 12139 | 358 | 11990 | 12287 | Borate / Peroxide Fusion ICP |
| Cu, Copper (ppm) | 53 | 6 | 49 | 56 | Borate / Peroxide Fusion ICP |
| Fe2O3, Iron(III) oxide (wt.%) | 24.63 | 0.577 | 24.21 | 25.06 | Borate / Peroxide Fusion ICP |
| MgO, Magnesium oxide (wt.%) | 9.95 | 0.285 | 9.76 | 10.13 | Borate / Peroxide Fusion ICP |
| MnO, Manganese oxide (wt.%) | 0.397 | 0.007 | 0.392 | 0.402 | Borate / Peroxide Fusion ICP |
| Ni, Nickel (wt.%) | 1.73 | 0.034 | 1.71 | 1.76 | Borate / Peroxide Fusion ICP |
| SiO2, Silicon dioxide (wt.%) | 47.67 | 1.004 | 46.92 | 48.43 | Borate / Peroxide Fusion ICP |
| TiO2, Titanium dioxide (wt.%) | 0.050 | 0.001 | 0.049 | 0.051 | Borate / Peroxide Fusion ICP |
| Zn, Zinc (ppm) | 297 | 8 | 288 | 305 | Borate / Peroxide Fusion ICP |
| LOI1000, Loss on ignition @1000 °C (wt.%) | 8.10 | 0.176 | 7.88 | 8.32 | Thermogravimetry |
| C, Carbon (wt.%) | 0.086 | 0.010 | 0.072 | 0.100 | Infrared Combustion |
Product Specifications
Certified Reference Values
| Analyte | Certified Value | Uncertainty (1SD) | 95% Confidence Low | 95% Confidence High | Method |
|---|
SD = Standard Deviation | CL = 95% Confidence Limits
Methods: AR = Aqua Regia, 4-Acid = 4-Acid Digestion, LBF = Lithium Borate Fusion, FA/AAS = Fire Assay with Atomic Absorption, LECO = LECO Combustion Analysis
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