OREAS 34i

OREAS 34i is a zinc tailings 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.%) 1.33 0.029 1.30 1.36 Peroxide Fusion ICP
Pb, Lead (wt.%) 0.297 0.011 0.290 0.304 Peroxide Fusion ICP
Ag, Silver (ppm) 9.09 0.562 8.72 9.47 Acid Digestion (no HF)
As, Arsenic (ppm) 2236 71 2179 2293 Acid Digestion (no HF)
Ca, Calcium (wt.%) 10.40 0.421 8.80 12.00 Acid Digestion (no HF)
Cd, Cadmium (ppm) 24.4 2.25 22.8 26.1 Acid Digestion (no HF)
Co, Cobalt (ppm) 148 4 144 152 Acid Digestion (no HF)
Cu, Copper (ppm) 237 8 228 246 Acid Digestion (no HF)
Fe, Iron (wt.%) 19.86 0.436 19.00 20.71 Acid Digestion (no HF)
Mg, Magnesium (wt.%) 4.89 0.098 4.79 4.98 Acid Digestion (no HF)
Mn, Manganese (ppm) 658 16 603 713 Acid Digestion (no HF)
Ni, Nickel (ppm) 411 14 399 422 Acid Digestion (no HF)
P, Phosphorus (ppm) 446 37 397 496 Acid Digestion (no HF)
Pb, Lead (wt.%) 0.292 0.011 0.280 0.303 Acid Digestion (no HF)
S, Sulphur (wt.%) 22.58 0.487 21.13 24.04 Acid Digestion (no HF)
Tl, Thallium (ppm) 234 22 219 250 Acid Digestion (no HF)
Zn, Zinc (wt.%) 1.34 0.041 1.32 1.36 Acid Digestion (no HF)
Ag, Silver (ppm) 9.45 0.793 8.80 10.09 Peroxide Fusion ICP
As, Arsenic (ppm) 2325 76 2179 2471 Peroxide Fusion ICP
Co, Cobalt (ppm) 152 24 140 163 Peroxide Fusion ICP
Cu, Copper (ppm) 230 21 215 246 Peroxide Fusion ICP
Fe, Iron (wt.%) 19.99 0.476 19.43 20.55 Peroxide Fusion ICP
Mg, Magnesium (wt.%) 5.13 0.240 4.87 5.40 Peroxide Fusion ICP
Ni, Nickel (ppm) 413 34 380 446 Peroxide Fusion ICP
Tl, Thallium (ppm) 235 7 187 282 Peroxide Fusion ICP
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  • 10g Sachet
    $4.45
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