OREAS 724
SKU: 724
OREAS 724 has been prepared from crystalline vein graphite rich ore blended
with granodiorite. The vein type graphite material was sourced from the Queens
Graphite Mine (QGM) in the Matale/Kurunegala Project area in central Sri Lanka.
The barren I-type hornblende-bearing granodiorite was sourced from the Late
Devonian Lysterfield granodiorite complex located in eastern Melbourne,
Australia.
Fifteen commercial analytical laboratories participated in the program to
characterise Total Graphitic Carbon (TGC) by hydrochloric acid leach (~50% HCl)
to remove carbonates followed by roasting (400-500°C) to remove organic carbon,
then analysis of the residue by infrared combustion furnace (Leco – CS
Analyser).
Specifications
- State: primary
- Matrix: granodiorite
- Mineralisation: crystalline vein
- CRM Group: Graphite
Certified Values
| Analyte | Certified Value | 1SD | 95% CL Low | 95% CL High | Method |
|---|---|---|---|---|---|
| C-(Graphite), Carbon, graphitic (wt.%) | 12.06 | 0.311 | 11.88 | 12.23 | 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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