OREAS 912
SKU: 912
OREAS 912 is a copper–gold certified reference material produced from a blend
of volcanogenic massive sulphide (VMS) ores and rhyodacite host rocks sourced
from the Firefly deposit, Canada. This CRM is intended for calibration and
quality control of analytical methods quantifying low-level Au, Ag, Cu and Zn in
VMS-style mineral systems. It replicates the mineralogical and geochemical
characteristics of natural Cu–Au VMS deposits, making it suitable for use in
routine laboratory QA/QC applications.
OREAS 912 has been characterized using the following methods:
Gold by fire assay (15-50g charge weight) with ICP-OES, ICP-MS or AAS
finish
Gold by aqua regia digestion (10-50g sample weight) with ICP-OES, ICP-MS
or AAS finish
Full ICP-OES and ICP-MS elemental suites by 4-acid (HNO3-HF-HClO4-HCl)
digestion
Full ICP-OES and ICP-MS elemental suites by aqua regia digestion
Copper by Sequential leach: acid leach, alkaline leach, residual leach and
calculated total
Certified values for applicable analytes are operationally defined for each
method, with results under OREAS ISO 17034 scope of
accreditation.
Specifications
- State: primary
- Matrix: rhyodacite
- Mineralisation: volcanic hosted massive sulphide
- CRM Group: Au-Cu ore
Certified Values
| Analyte | Certified Value | 1SD | 95% CL Low | 95% CL High | Method |
|---|---|---|---|---|---|
| Au, Gold (ppm) | 1.50 | TBD | TBD | TBD | Pb Fire Assay |
| Cu, Copper (wt.%) | 1.10 | TBD | TBD | TBD | Sequential Leach |
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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