OREAS 34k

OREAS 34k 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 Low 95% Confidence High Method
Zn, Zinc (wt.%) 23.50 0.417 23.23 23.78 Peroxide Fusion ICP
Pb, Lead (wt.%) 2.08 0.050 2.05 2.11 Acid Digestion (no HF)
Ag, Silver (ppm) 17.4 1.19 16.6 18.2 Acid Digestion (no HF)
As, Arsenic (ppm) 2194 86 2149 2239 Acid Digestion (no HF)
Ba, Barium (ppm) 161 17 137 186 Acid Digestion (no HF)
Ca, Calcium (wt.%) 4.16 0.127 3.89 4.43 Acid Digestion (no HF)
Cd, Cadmium (ppm) 499 15 481 517 Acid Digestion (no HF)
Co, Cobalt (ppm) 215 7 209 220 Acid Digestion (no HF)
Cu, Copper (ppm) 76 5.2 70 83 Acid Digestion (no HF)
Fe, Iron (wt.%) 20.38 0.434 19.43 21.34 Acid Digestion (no HF)
Mg, Magnesium (wt.%) 1.41 0.032 1.35 1.47 Acid Digestion (no HF)
Mn, Manganese (ppm) 167 6 145 188 Acid Digestion (no HF)
Ni, Nickel (ppm) 611 17 598 624 Acid Digestion (no HF)
P, Phosphorus (ppm) 414 39 343 484 Acid Digestion (no HF)
S, Sulphur (wt.%) 33.21 1.059 31.65 34.77 Acid Digestion (no HF)
Tl, Thallium (ppm) 352 21 333 370 Acid Digestion (no HF)
Zn, Zinc (wt.%) 23.76 0.508 23.38 24.14 Acid Digestion (no HF)
As, Arsenic (ppm) 2246 77 2097 2394 Peroxide Fusion ICP
Cd, Cadmium (ppm) 497 11 457 536 Peroxide Fusion ICP
Co, Cobalt (ppm) 208 10 200 217 Peroxide Fusion ICP
Cu, Copper (ppm) 89 3.9 75 102 Peroxide Fusion ICP
Fe, Iron (wt.%) 20.51 0.449 19.83 21.19 Peroxide Fusion ICP
Mg, Magnesium (wt.%) 1.47 0.028 1.41 1.53 Peroxide Fusion ICP
Ni, Nickel (ppm) 578 38 539 617 Peroxide Fusion ICP
Pb, Lead (wt.%) 2.05 0.046 1.98 2.12 Peroxide Fusion ICP
Tl, Thallium (ppm) 353 18 285 422 Peroxide Fusion ICP
Downloads
Certificate DataPack SDS NRAM (221 KB)
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  • 10g Sachet
    $4.45
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Specifications
CRM Group