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OREAS 733
OREAS 733 is a certified reference material produced from high-grade bauxite ore sourced from Rio Tinto’s Amrun Bauxite Mine in Far North Queensland, Australia. The Amrun deposit represents a major component of Rio Tinto’s bauxite-to-aluminium supply chain and is one of the largest and most advanced bauxite operations globally, with annual production reaching over 20 million tonnes. The ore is typical of lateritic bauxite deposits and is processed both domestically and internationally to meet alumina and aluminium production demands.
OREAS 733 has been characterised using the following methods:
- Bauxite suite by fusion with XRF, including Loss on Ignition (LOI) at 1000 °C
- Borate/peroxide fusion with ICP-OES & ICP-MS finishes
- Available Alumina and Reactive Silica by 145 °C BOMB digestion with appropriate instrumental or classical finishes
- Total Organic Carbon by infrared combustion furnace
Certified values for applicable analytes are operationally defined for each method, with results included under OREAS ISO 17034 scope of accreditation.
Note: Analyte values are indicative only and may change when certified.
| Analyte | Indicative Value | 1SD | Expanded Uncertainty Low | Expanded Uncertainty High | Method |
|---|---|---|---|---|---|
| Al, Aluminium (wt.%) | 28.00 | TBD | TBD | TBD | Borate Fusion XRF |
| Fe, Iron (wt.%) | 7.00 | TBD | TBD | TBD | Borate Fusion XRF |
| Si, Silicon (wt.%) | 4.00 | TBD | TBD | TBD | Borate Fusion XRF |
| Ti, Titanium (wt.%) | 1.50 | TBD | TBD | TBD | Borate Fusion XRF |
| Ca, Calcium (wt.%) | 0.010 | TBD | TBD | TBD | Borate Fusion XRF |
| Na, Sodium (wt.%) | 0.020 | TBD | TBD | TBD | Borate Fusion XRF |
Downloads
Certificate DataPack SDS NRAM (226 KB)Stock
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