Determination of 226Ra at ultratrace level in mineral water samples by sector field inductively coupled plasma mass spectrometry

Miroslav V. Zoriy, Zoltan Varga, Carola Pickhardt, Peter Ostapczuk, Ralf Hille, Ludwik Halicz, Irina Segal, J. Sabine Becker

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

An analytical procedure has been proposed for the determination of 226Ra at the low femtogram per ml concentration level in mineral water samples using double focusing sector field TCP-MS (ICP-SFMS). For the pre-concentration and separation of radium from the matrix elements in water a tandem of a laboratory-prepared filter, based on MnO2, and Eichrom "Sr-specific" resin was used. The recovery of the method was determined to be 70.5%. The limit of detection for 226Ra determination was 0.02 fg ml-1, including a pre-concentration factor of 10. In addition, uranium concentration and uranium isotope ratios were measured by ICP-SFMS. In several mineral water samples with a relatively high uranium content, 226Ra concentrations were found between 0.7-15 fg ml-1. The effective dose of the contribution was calculated using the radionuclide concentration and dose conversion factors from the World Health Organization, WHO (1993). Assuming a mineral water consumption of 2 1 d -1, a slightly higher calculated dose than the suggested limit for drinking water (0.1 mSv y-1) was found in some samples.

Original languageEnglish (US)
Pages (from-to)514-518
Number of pages5
JournalJournal of Environmental Monitoring
Volume7
Issue number5
DOIs
StatePublished - May 1 2005
Externally publishedYes

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