SUMMARY
The application note summarizes the digestion of OREAS 700, a tungsten-copper-gold-magnetite ore, using ColdBlock™ Digestion Pro Series Technology.
| Instrument: | ColdBlock CBM Pro Series, chiller, ICP-OES |
| Published: | June 2025 |
| Digestion Time: | 35 Minutes |
| Acid Used: | HNO3, HCl, HF & H3BO3 |
| Average ColdBlock Recovery vs. CRM: |
|
1. Set the chiller temperature to -5°C.
2. Weigh 0.25 g of each sample and transfer into a ColdBlock™ Digestion vessel
3. Add 20 mL of aqua regia (add HNO3 first, followed by HCl) and 3 mL of HF to each vessel.
4. Digest samples at 80% power for 20 minutes.
5. Add 20 mL of 4% boric acid (w/v) to each sample.
6. Digest samples again at 80% power for 10 minutes.
7. Add 5 mL of HCl.
8. Digest at 100% power for 5 minutes.
9. Cool the samples and adjust the volume to 50 mL with DI water.
OREAS 700 was prepared from skarn tungsten-magnetite ore from the White Rock W-Sn deposit located in NSW, Australia with the addition of a minor quantity of Cu-Au concentrate. OREAS 700; Tungsten Copper Gold Magnetite Ore; Certificate of Analysis OREAS, Ore Research & Exploration Pty Ltd; Victoria, Australia (July 2014) Retrieved from: www.oreas.com/
Tungsten-Copper-Gold-Magnetite Ore OREAS 700 | |||||
Method: | 0.25g – Add 20mL aqua regia + 3mL HF and digest at 80% power for 20 minutes. Add 20mL of 4% boric acid w/v and digest again at 80% power for 10 minutes. | ||||
Element | OREAS Certified Values | ColdBlock Average | ColdBlock SD +/– | ColdBlock RSD | Recovery vs Certified Value |
Al (%) | 5.57 | 5.46 | 0.06 | 1.2% | 98% |
As (ppm) | 4.35 | <5 | N/A | N/A | N/A |
Ba (ppm) | 158 | 152 | 1.81 | 1.2% | 96% |
Ca (%) | 5.55 | 5.50 | 0.10 | 1.8% | 99% |
Co (ppm) | 16.8 | 17.4 | 0.53 | 3.0% | 104% |
Cr (ppm) | 47.2 | 47.2 | 0.42 | 0.9% | 100% |
Cu (%) | 0.202 | 0.203 | 0.003 | 1.5% | 100% |
Fe (%) | 15.57 | 15.55 | 0.14 | 0.9% | 100% |
K (%) | 1.57 | 1.53 | 0.008 | 0.5% | 97% |
Li (ppm) | 223 | 217 | 2.87 | 1.3% | 97% |
Mg (%) | 0.995 | 0.990 | 0.008 | 0.8% | 99% |
Mn (%) | 0.314 | 0.306 | 0.004 | 1.3% | 97% |
Mo (ppm) | 81 | 81 | 3.25 | 4.0% | 100% |
Na (%) | 1.21 | 1.16 | 0.02 | 1.7% | 96% |
Ni (ppm) | 24.1 | 27.0 | 2.14 | 7.9% | 112% |
P (%) | 0.347 | 0.341 | 0.005 | 1.5% | 98% |
Pb (ppm) | 6.83 | <10 | N/A | N/A | N/A |
S (%) | 0.295 | 0.301 | 0.002 | 0.7% | 102% |
Sb (ppm) | 0.7 | <10 | N/A | N/A | N/A |
Sn (ppm) | 133 | 129 | 2.29 | 1.8% | 97% |
Sr (ppm) | 124 | 120 | 1.33 | 1.1% | 97% |
Ti (%) | 0.179 | 0.168 | 0.002 | 1.2% | 94% |
V (ppm) | 62 | 65 | 0.88 | 1.4% | 105% |
W (%) | 0.989 | 1.027 | 0.103 | 10.0% | 104% |
Zn (ppm) | 216 | 220 | 3.34 | 1.5% | 102% |
Zr (ppm) | 47.3 | 50.1 | 0.43 | 0.9% | 106% |
Click here to download the Application Note in PDF format.
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