Authors:
H. Bjørnstad Agricultural University of Norway Isotope and Electron Microscopy Laboratories P. O. Box 26 N-1432 Aas-NLH (Norway)

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H. Lien Agricultural University of Norway Isotope and Electron Microscopy Laboratories P. O. Box 26 N-1432 Aas-NLH (Norway)

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Yu-Fu Yu Agricultural University of Norway Isotope and Electron Microscopy Laboratories P. O. Box 26 N-1432 Aas-NLH (Norway)

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B. Salbu Agricultural University of Norway Isotope and Electron Microscopy Laboratories P. O. Box 26 N-1432 Aas-NLH (Norway)

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Abstract  

Low level90Sr in environmental and biological samples is determined using a combined HDEHP solvent extraction-liquid scintillation procedure. Yttrium-90 is selectively extracted from nitric acid solution into 5% di(2-ethylhexyl) phosphoric acid (HDEHP) in toluene, and90Y in the organic phase is measured directly using an ultra low level liquid scintillation spectrometer.The working program of the Quantulus counter has been optimized. As the counting efficiency using liquid scintillation counting is high and the stripping and precipitation of Yttrium-90 oxalate is omitted, this procedure is simpler and more timesaving than traditional methods. The chemical recoveries of90Y were 85.1% for soil, 75.7% for milk and 65.3% for bone. The detection limit is 8 mBq.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)