Determination of trace amounts of barium in calcium-containing matrices by atomic-absorption spectrophotometry following solvent extraction with polyethylene glycol
- 1 January 1981
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in The Analyst
- Vol. 106 (1266) , 939-943
- https://doi.org/10.1039/an9810600939
Abstract
Polyethylene glycol (PEG) 1540 shows a high efficiency (almost 100%) for the extraction of barium from a calcium matrix under appropriate conditions. This has permitted trace amounts of barium in a calcium matrix to be determined by flame atomic-absorption spectrophotometry without interference from calcium. The effectiveness of PEG is noteworthy because of its ready availability and cheapness compared with the 18-crown-6 used in existing procedures. Further, the extraction process may be completed successfully in one step without subsequent washing of the organic phase.Keywords
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