Comparison of methods for the determination of sodium in alumina
- 1 January 1984
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in The Analyst
- Vol. 109 (11) , 1469-1473
- https://doi.org/10.1039/an9840901469
Abstract
Four methods of determining sodium in refractory aluminas are compared: high-pressure acid dissolution, fusion with calcium metaborate, acid leaching and instrumental neutron-activation analysis. Acid leaching is shown to be unreliable; calcium metaborate fusion is suitable down to 50 µg g–1 of sodium; high-pressure acid dissolution can be used for very pure samples (–1 of sodium) without any contamination by grinding; and neutron activation gives good results with a similar limit of detection.Keywords
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