caa a22 4500 469111658 CHVBK 20180323133112.0 cr unu---uuuuu 170328e19920101xx s 000 0 eng 10.1007/BF02037431 doi (NATIONALLICENCE)springer-10.1007/BF02037431 Determination of90Sr in environmental and biological materials with combined HDEHP solvent extraction-low liquid scintillation counting technique [Elektronische Daten] [H. Bjørnstad, H. Lien, Yu-Fu Yu, B. Salbu] 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. Akadémiai Kiadó, 1992 Bjørnstad H. Isotope and Electron Microscopy Laboratories, Agricultural University of Norway, P. O. Box 26, N-1432, Aas-NLH, (Norway) aut Lien H. Isotope and Electron Microscopy Laboratories, Agricultural University of Norway, P. O. Box 26, N-1432, Aas-NLH, (Norway) aut Yu Yu-Fu Isotope and Electron Microscopy Laboratories, Agricultural University of Norway, P. O. Box 26, N-1432, Aas-NLH, (Norway) aut Salbu B. Isotope and Electron Microscopy Laboratories, Agricultural University of Norway, P. O. Box 26, N-1432, Aas-NLH, (Norway) aut Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 156/1(1992-01-01), 165-173 0236-5731 156:1<165 1992 156 10967 https://doi.org/10.1007/BF02037431 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02037431 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bjørnstad H. Isotope and Electron Microscopy Laboratories, Agricultural University of Norway, P. O. Box 26, N-1432, Aas-NLH, (Norway) aut NATIONALLICENCE 700 1- Lien H. Isotope and Electron Microscopy Laboratories, Agricultural University of Norway, P. O. Box 26, N-1432, Aas-NLH, (Norway) aut NATIONALLICENCE 700 1- Yu Yu-Fu Isotope and Electron Microscopy Laboratories, Agricultural University of Norway, P. O. Box 26, N-1432, Aas-NLH, (Norway) aut NATIONALLICENCE 700 1- Salbu B. Isotope and Electron Microscopy Laboratories, Agricultural University of Norway, P. O. Box 26, N-1432, Aas-NLH, (Norway) aut NATIONALLICENCE 773 0- Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 156/1(1992-01-01), 165-173 0236-5731 156:1<165 1992 156 10967 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer