OREAS 472
SKU: 472
OREAS 472 is a clay-hosted rare earth element (REE) certified reference
material produced from a blend of kaolin, REE ore, siltstone, and high-purity
silica. It is designed to support the calibration and quality control of
geochemical methods targeting total rare-earth and yttrium oxides (TREO+Y2O3).
This CRM is part of the Critica Jupiter – Clay-hosted REE CRM suite, developed
to support exploration and metallurgical assessment of REE-bearing lateritic and
weathered systems.
OREAS 470 has been characterised using the following methods:
Borate Fusion with XRF litho / silicate rock package
Thermogravimetric LOI at 1000 °C
Borate/Peroxide Fusion – Full ICP-OES and MS elemental suites
4-Acid – Full ICP-OES and MS elemental suites
Certified values for applicable analytes are operationally defined for each
method, with results under OREAS ISO 17034 scope of
accreditation.
Specifications
- State: oxide
- Matrix: smectite clay
- Mineralisation: lateritic
- CRM Group: REE
Certified Values
| Analyte | Certified Value | 1SD | 95% CL Low | 95% CL High | Method |
|---|---|---|---|---|---|
| TREO, Total Rare Earth Oxides (ppm) | 900 | TBD | TBD | TBD | Borate Fusion XRF |
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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