OREAS 702
SKU: 702
OREAS 702 is a new W–Bi–Mo certified reference material prepared from a blend
of tungsten (WO₃) and bismuth concentrates from the Nui Phao polymetallic
deposit (Vietnam), supplemented with molybdenum-bearing material, fluorite,
limestone, and a granitic host matrix. This blend is designed to reflect the
complex geochemical associations typical of W–Bi–Mo mineralisation systems,
including elevated sulphur and fluorine.
OREAS 702 has been characterised using the following methods:
Borate Fusion XRF- Majors and some traces, including Loss on Ignition
(LOI) at 1000 °C
Fluorine by ion selective electrode
Total S by infrared combustion furnace/CS analyser
Sodium peroxide fusion with full suite elemental package by ICP-OES and/or
MS finish
4-acid digestion for full suite elemental package by ICP-OES and MS
finish
Certified values for applicable analytes are operationally defined for each
method, with results included under OREAS ISO 17034 scope of
accreditation.
Specifications
- State: primary
- Matrix: granitic/gneissic
- Mineralisation: skarn
- CRM Group: W ore
Certified Values
| Analyte | Certified Value | 1SD | 95% CL Low | 95% CL High | Method |
|---|---|---|---|---|---|
| W, Tungsten (wt.%) | 0.254 | TBD | TBD | TBD | Borate Fusion XRF |
| Bi, Bismuth (wt.%) | 0.030 | TBD | TBD | TBD | Borate Fusion XRF |
| Mo, Molybdenum (wt.%) | 0.060 | TBD | TBD | TBD | Borate Fusion XRF |
| S, Sulphur (wt.%) | 0.340 | TBD | TBD | TBD | Infrared Combustion |
| F, Fluorine (wt.%) | 0.220 | TBD | TBD | TBD | Ion Selective Electrode |
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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