NDLI: Determination of <sup>90</sup>Sr at ultratrace levels in urine by ICP-MS

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Determination of ⁹⁰Sr at ultratrace levels in urine by ICP-MS

Content Provider	Royal Society of Chemistry (RSC)
Author	Becker, J. Sabine Hille, Ralf Zoriy, Myroslav V. Vonderheide, Anne P. Izmer, Andrei V. Ostapczuk, Peter Pickhardt, Carola Caruso, Joseph A.
Copyright Year	2004
Abstract	90Sr appears as a radionuclide in the decay series of nuclear fission and can therefore be found in nuclear waste or released by nuclear accidents. Current methods for the detection of this radionuclide are time consuming and may be prone to a large variety of interferents. In this work, inductively coupled plasma mass spectrometry is explored for the determination of 90Sr in the presence of stable zirconium in urine. Specific techniques are investigated to remove this as well as other contributions to the background at m/z = 90. A quadrupole ICP-MS equipped with a hexapole collision cell is first explored (final LOD = 2 ng L−1 for water samples), however, the desired limit of detection for 90Sr in urine is quite low (0.02 pg L−1). The performance of a double-focusing sector field ICP mass spectrometer (ICP-SFMS) is further investigated, which allows measurement of 90Sr at the ultratrace level. Other potential interferences were investigated and instrumental detection limits are calculated as 3 pg L−1 for water samples. Final parameters include the use of a cool plasma and medium mass resolution in ICP-SFMS. The method is applied to the analysis of 90Sr extracted from urine using a crown ether extraction resin and concentrated (enrichment factor: 200); high levels of natural strontium in the separated fraction (of about 1 µg mL−1) equate to higher detection limits (80 pg L−1) due to 88Sr+ at m/z = 90 and the relatively low abundance sensitivity of ICP-SFMS at medium mass resolution of 6 × 10−7. This detection limit in the separated fraction corresponds to the detection limit of 0.4 pg L−1 in the original urine sample. The recovery of 90Sr, determined with the developed analytical method in spiked urine samples, was in the range of 82–86%.
Starting Page	675
Ending Page	680
Page Count	6
File Format	HTM / HTML PDF
ISSN	02679477
Volume Number	19
Issue Number	5
Journal	Journal of Analytical Atomic Spectrometry
DOI	10.1039/b311451c
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Strontium-90 Radioactive decay Nuclear fission Radioactive waste Inductively coupled plasma mass spectrometry Zirconium Urine Quadrupole Mass spectrometry Blood plasma Crown ether Resin Strontium
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Analytical Chemistry

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