OREAS 26a

OREAS 26a is a basalt blank chip (nominal minus 6 mm) certified reference material. The material was sourced from a quarry containing fresh olivine tholeiite (Newer Volcanics Province), near Melbourne (Victoria), Australia.  It has been certified for:

  • Au via 25-40g fire assay with ICP-MS (5 labs) or ICP-OES (4 labs) finish
  • Ba, Cd, Co, Cu, Fe, Mo, Ni, Pb, Sn, Th, U, W and Zn  via four acid digestion (HNO3-HClO4-HCl-HF) with ICP-OES and ICP-MS finish (10 labs)
Analyte Certified Value 1SD 95% Confidence Limits Low 95% Confidence Limits High Method
Au, Gold (ppb) < 1 IND IND IND Pb Fire Assay
Cu, Copper (ppm) 50 4.6 47 53 4-Acid Digestion
Pb, Lead (ppm) 2.73 0.35 2.48 2.98 4-Acid Digestion
Ba, Barium (ppm) 281 14 273 289 4-Acid Digestion
Cd, Cadmium (ppm) 0.052 0.010 0.044 0.061 4-Acid Digestion
Co, Cobalt (ppm) 46.1 2.57 44.2 48.1 4-Acid Digestion
Fe, Iron (wt.%) 7.76 0.419 7.37 8.15 4-Acid Digestion
Mo, Molybdenum (ppm) 1.50 0.073 1.46 1.54 4-Acid Digestion
Ni, Nickel (ppm) 163 12 155 171 4-Acid Digestion
Sn, Tin (ppm) 1.57 0.122 1.47 1.68 4-Acid Digestion
Th, Thorium (ppm) 2.75 0.112 2.69 2.81 4-Acid Digestion
U, Uranium (ppm) 0.72 0.049 0.69 0.74 4-Acid Digestion
W, Tungsten (ppm) 0.50 0.048 0.45 0.55 4-Acid Digestion
Zn, Zinc (ppm) 107 5 103 110 4-Acid Digestion
Downloads
Certificate DataPack SDS NRAM (231 KB)
Archived

This CRM is no longer available.
Information is provided for reference only.

Specifications