Determination of 226Ra in environmental samples by alpha spectrometry: a new separation method based on the rapid co-precipitation of 226Ra with PbSO4.

Autor:	Guérin, Nicolas, Behm, Deborah, Leppinen, John, Gagné, Alexandre
Předmět:	ENVIRONMENTAL sampling SPECTROMETRY COPRECIPITATION (Chemistry) SULFURIC acid REFERENCE sources FILTERS & filtration
Zdroj:	Journal of Radioanalytical & Nuclear Chemistry; Oct2023, Vol. 332 Issue 10, p4311-4323, 13p, 1 Diagram, 5 Charts, 6 Graphs
Abstrakt:	A new method to determine 226Ra by alpha spectrometry from various environmental samples was developed. After sample dissolution, Ra(II) was co-precipitated with PbSO4, and the precipitate was quickly filtered 1 min later. The rapid filtration of PbSO4 prevented CaSO4 and SrSO4 from precipitating. The Pb(Ra)SO4 precipitate was re-dissolved using an EDTA solution and the pH was adjusted to 5 with sulfuric acid. Then, a BaSO4 micro-precipitation was performed to prepare a Ra thin-layer source for measurement of 226Ra by alpha spectrometry. Excellent decontamination factors were obtained. The method was validated using spiked samples and certified reference materials. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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