OREAS 34h

OREAS 34h 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.%) 12.18 0.253 12.00 12.37 Peroxide Fusion ICP
Pb, Lead (wt.%) 1.44 0.031 1.39 1.48 Peroxide Fusion ICP
Ag, Silver (ppm) 21.8 0.89 21.1 22.5 Acid Digestion (no HF)
As, Arsenic (ppm) 2415 71 2359 2472 Acid Digestion (no HF)
Ca, Calcium (wt.%) 8.08 0.272 6.87 9.30 Acid Digestion (no HF)
Cd, Cadmium (ppm) 196 5 188 204 Acid Digestion (no HF)
Co, Cobalt (ppm) 168 6 161 174 Acid Digestion (no HF)
Cu, Copper (ppm) 628 16 606 650 Acid Digestion (no HF)
Fe, Iron (wt.%) 18.89 0.486 18.39 19.38 Acid Digestion (no HF)
Mg, Magnesium (wt.%) 3.75 0.088 3.63 3.87 Acid Digestion (no HF)
Mn, Manganese (ppm) 405 11 364 447 Acid Digestion (no HF)
Ni, Nickel (ppm) 494 16 478 511 Acid Digestion (no HF)
P, Phosphorus (ppm) 336 26 292 379 Acid Digestion (no HF)
Pb, Lead (wt.%) 1.46 0.042 1.44 1.49 Acid Digestion (no HF)
S, Sulphur (wt.%) 26.32 0.880 25.39 27.26 Acid Digestion (no HF)
Sb, Antimony (ppm) 4.08 0.55 3.23 4.92 Acid Digestion (no HF)
Tl, Thallium (ppm) 246 16 228 265 Acid Digestion (no HF)
Zn, Zinc (wt.%) 12.25 0.215 11.99 12.52 Acid Digestion (no HF)
Ag, Silver (ppm) 22.4 0.69 19.5 25.3 Peroxide Fusion ICP
As, Arsenic (ppm) 2550 89 2409 2691 Peroxide Fusion ICP
Co, Cobalt (ppm) 169 11 161 177 Peroxide Fusion ICP
Cu, Copper (ppm) 610 16 595 626 Peroxide Fusion ICP
Fe, Iron (wt.%) 18.73 0.546 17.94 19.52 Peroxide Fusion ICP
Mg, Magnesium (wt.%) 3.87 0.178 3.62 4.11 Peroxide Fusion ICP
Ni, Nickel (ppm) 483 5 447 519 Peroxide Fusion ICP
Tl, Thallium (ppm) 241 22 199 283 Peroxide Fusion ICP
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  • 10g Sachet
    $4.45
Specifications
CRM Group