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OREAS 34j
OREAS 34j is a zinc ore certified reference material sourced from the Lisheen carbonate hosted Zn-Pb deposit located in south-central Ireland. It is prepared from a blend of tailings, ore, intermediate and concentrate samples.
Ten commercial laboratories participated in the analytical certification program. Both partial and total methods were employed creating two sets of certified values including:
- Multi-element suite by acid digestion (no HF) with instrumental finish (10 laboratories);
- Multi-element suite by sodium peroxide fusion with ICP-OES/MS (up to 6 laboratories depending on the element), four acid digestion with ICP-OES/MS or AAS (up to 2 laboratories depending on the element) and INAA (one laboratory for certain elements).
| Analyte | Certified Value | 1SD | 95% Confidence Limits Low | 95% Confidence Limits High | Method |
|---|---|---|---|---|---|
| Zn, Zinc (wt.%) | 34.18 | 0.707 | 33.39 | 34.96 | Acid Digestion (no HF) |
| Pb, Lead (wt.%) | 1.16 | 0.032 | 1.14 | 1.18 | Acid Digestion (no HF) |
| Ag, Silver (ppm) | 45.6 | 1.42 | 44.4 | 46.7 | Acid Digestion (no HF) |
| As, Arsenic (ppm) | 3075 | 103 | 3021 | 3130 | Acid Digestion (no HF) |
| Ca, Calcium (wt.%) | 3.20 | 0.097 | 3.00 | 3.40 | Acid Digestion (no HF) |
| Cd, Cadmium (ppm) | 647 | 22 | 619 | 674 | Acid Digestion (no HF) |
| Co, Cobalt (ppm) | 324 | 9 | 313 | 334 | Acid Digestion (no HF) |
| Cu, Copper (ppm) | 873 | 15 | 825 | 920 | Acid Digestion (no HF) |
| Fe, Iron (wt.%) | 15.16 | 0.522 | 14.39 | 15.94 | Acid Digestion (no HF) |
| Mg, Magnesium (wt.%) | 1.19 | 0.036 | 1.14 | 1.24 | Acid Digestion (no HF) |
| Mn, Manganese (ppm) | 236 | 9 | 220 | 252 | Acid Digestion (no HF) |
| Mo, Molybdenum (ppm) | 29.0 | 2.51 | 21.7 | 36.3 | Acid Digestion (no HF) |
| Ni, Nickel (ppm) | 909 | 27 | 882 | 936 | Acid Digestion (no HF) |
| P, Phosphorus (ppm) | 354 | 24 | 290 | 419 | Acid Digestion (no HF) |
| S, Sulphur (wt.%) | 31.36 | 1.007 | 28.90 | 33.81 | Acid Digestion (no HF) |
| Sb, Antimony (ppm) | 5.49 | 0.64 | 4.04 | 6.94 | Acid Digestion (no HF) |
| Tl, Thallium (ppm) | 288 | 20 | 270 | 306 | Acid Digestion (no HF) |
| Cu, Copper (ppm) | 858 | 39 | 741 | 975 | Peroxide Fusion ICP |
| Fe, Iron (wt.%) | 15.19 | 0.366 | 14.25 | 16.14 | Peroxide Fusion ICP |
Downloads
Certificate DataPack SDS NRAM (412 KB)Specifications
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