OREAS 99b

OREAS 99b is a copper-silver concentrate certified reference material (CRM) prepared and certified by Ore Research & Exploration for copper, silver, iron, sulphur, bismuth, cobalt, lead, antimony, selenium, tin and zinc. The material used to prepare OREAS 99b was sourced from the CSA mine in Cobar, New South Wales. Ten commercial laboratories participated in the analytical program to characterise copper, silver, iron, sulphur, bismuth, cobalt, lead, antimony, selenium, tin and zinc in OREAS 99b. Ten umpire laboratories also determined copper and silver by ‘classical’ methods.
Analyte Certified Value 1SD 95% Confidence Limits Low 95% Confidence Limits High Method
Cu, Copper (wt.%) 28.90 0.100 28.83 28.97 Classical Wet Chemistry
Ag, Silver (ppm) 81.1 2.50 79.2 83.1 Classical Wet Chemistry
S, Sulphur (wt.%) 31.60 0.700 30.90 32.30 Infrared Combustion
Ag, Silver (ppm) 77.0 3.20 74.4 79.6 4-Acid Digestion
Bi, Bismuth (ppm) 215 24 197 233 4-Acid Digestion
Co, Cobalt (ppm) 157 18 144 170 4-Acid Digestion
Cu, Copper (wt.%) 28.90 0.680 28.43 29.37 4-Acid Digestion
Fe, Iron (wt.%) 30.18 2.010 28.62 31.74 4-Acid Digestion
Pb, Lead (ppm) 619 23 606 633 4-Acid Digestion
S, Sulphur (wt.%) 30.80 0.500 30.00 31.60 4-Acid Digestion
Sb, Antimony (ppm) 21.0 5.0 17.0 24.0 4-Acid Digestion
Se, Selenium (ppm) 321 48 284 358 4-Acid Digestion
Sn, Tin (ppm) 342 44 308 377 4-Acid Digestion
Zn, Zinc (wt.%) 0.220 0.014 0.209 0.230 4-Acid Digestion
Ag, Silver (ppm) 78.6 1.80 77.0 80.1 Aqua Regia Digestion
Bi, Bismuth (ppm) 209 14 199 219 Aqua Regia Digestion
Co, Cobalt (ppm) 142 13 129 154 Aqua Regia Digestion
Cu, Copper (wt.%) 28.74 0.780 28.12 29.36 Aqua Regia Digestion
Fe, Iron (wt.%) 31.08 0.950 30.19 31.97 Aqua Regia Digestion
Pb, Lead (ppm) 625 83 558 691 Aqua Regia Digestion
S, Sulphur (wt.%) 29.90 2.200 27.10 32.70 Aqua Regia Digestion
Sb, Antimony (ppm) ~20.0 Aqua Regia Digestion
Se, Selenium (ppm) 268 36 237 299 Aqua Regia Digestion
Sn, Tin (ppm) 328 52 277 379 Aqua Regia Digestion
Zn, Zinc (wt.%) 0.216 0.024 0.195 0.238 Aqua Regia Digestion
Downloads
Certificate DataPack SDS NRAM (231 KB)
Archived

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

Specifications