BH-1 Certificate of Analysis
Certified Reference Material: Tungsten Ore
Printable version of the certificate (PDF, 328.65 kb)
BH-1 is a sample of wolframite ore, hand-picked in 1973 from a stockpile at the Burnt Hill deposit near Fredericton, New Brunswick, the deposit being owned by International Paper Company Limited. Minerals present in decreasing order of abundance are: quartz, biotite, chlorite, muscovite, feldspar, pyrrhotite, beryl and topaz, wolframite, cassiterite and rutile, pyrite, molybdenite, bismuth, bismuthinite and galena, and chalcopyrite.
Certified Value and 95% Confidence Interval
Tungsten 0.422 ± 0.008 wt %
A certificate of analysis will be issued with each order of BH-1. A copy of CANMET Report 76-5, "Tungsten ores CT-1, BH-1 and TLG-1: Their characterization and preparation for use as certified reference materials", will be forwarded, free of charge, on request to the Coordinator, CCRMP.
| Constituent | wt % |
|---|---|
| W | 0.422 |
| Si | 38.0 |
| Al | 3.5 |
| Fe (total) | 3.2 |
| Ca | 0.5 |
| Mg | 0.4 |
| Na | 0.1 |
| K | 1.7 |
| Ti | 0.4 |
| Mn | 0.2 |
| Mo | 0.02 |
| C (total) | 0.1 |
| H2O+(950°C) | 0.9 |
| H2O-(105°C) | 0.08 |
For further information
CCRMP, CanmetMINING
555 Booth Street
Ottawa, ON K1A 0G1
Canada
Telephone: 343-543-6830
E-mail: Contact CCRMP
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