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 Low 95% Confidence 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 (221 KB)
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