OREAS 999 Spodumene Concentrate

APPLICATION NOTE

SUMMARY

The application note summarizes the digestion of OREAS 999, a Spodumene Concentrate Certified Reference Material using ColdBlock Digestion CBM Technology.

Instrument:	ColdBlock CBM sample digester, chiller, HF liners, ICP-OES
Published:	November 2022
Digestion Time:	30 Minutes
Acid Used:	Aqua Regia, HF & H₃BO₃
Average ColdBlock Recovery vs. CRM:	99% Lithium 97% Calcium 105% Magnesium

METHODOLOGY

Chiller temperature was set to -5°C
0.25g of each sample was weighed in triplicate and placed into ColdBlock™ Digestion HF compatible liners
20 mL Aqua Regia + 3mL Hydrofluoric Acid was added
Sample was digested at 80% power for 20 minutes
20mL of 4% Boric Acid was added, and sample was digested again at 80% power for 10 minutes
Sample was cooled and bulked to 50mL using 2% HNO3 v/v

DISCUSSION

The addition of Boric Acid will help re-solubilize any Fluoride precipitates that form such as Ca, Mg & Al
After 30 minutes the samples appear clear, and no visible material remains

OREAS 999 after bulk-up

OREAS 999 is a spodumene concentrate derived from the processing of lithium pegmatite ores sourced from the Greenbushes area of Southwestern Australia

Results

OREAS 999
20mL AR + 3mL HF – 80% 20 minutes + 20mL 4% H₃BO₃ 80% 10 minutes
Element	Certified 4-Acid (ppm)	ColdBlock Result A	ColdBlock Result B	ColdBlock Result C	Average (ppm)	Stdev	% RSD	% Recovery
Al	107700	111155	112839	115408	113134	1749	1.5%	105%
Ca	4500	4313	4307	4407	4343	46	1.1%	97%
Fe	16200	16043	16231	16638	16304	248	1.5%	101%
K	5000	4941	4593	4795	4777	143	3.0%	96%
Mg	4100	4359	4395	4134	4296	115	2.7%	105%
Na	6930	6555	6653	6781	6663	92	1.4%	96%
Li	26500	25858	26199	26855	26304	414	1.6%	99%

Click here to download the Application Note in PDF format.

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