2016 CAP Congress / Congrès de l'ACP 2016

Optimization of a methodology to determine 90Sr in biota and water samples by ICP MS QQQ and LSC

14 Jun 2016, 08:45

15m

SITE J0106 (University of Ottawa)

Oral (Non-Student) / orale (non-étudiant) Industrial and Applied Physics / Physique industrielle et appliquée (DIAP-DPIA) T1-7 Mass spectrometry in nuclear waste management and control at the border (DIAP-DIMP) / Spectrométrie de masse dans la gestion des déchets nucléaires et surveillance à la frontière (DPIA-DPIM)

Speaker

Barbara Francisco (University of Ottawa)

Description

90Sr (t1/2 = 28.80yr) has a relatively long life and due to its chemical similarity to calcium, 90Sr accumulates within the skeletal structure of animals and some plants. The aim of this work is optimize a methodology to determine stable Sr and 90Sr in environmental samples including plants, insects, animals and water. The 88Sr was measured by ICP-MS Triple Quad (8800, Agilent Technologies) and 90Sr by Liquid Scintillation Spectrometer (Quantalus 1220, Perkin Elmer). The Sr was separated from the matrix using the specific Sr EiChrom single resin method (Horwitz 1992). We modified this method to improve the yield and reproducibility of the results. Our optimization focused on adjusting the nitric acid concentration in samples, (8mol L-1) and the use of higher concentrations of hydrochloric acid (6mol L-1) to successfully elute the Sr from the resin. The proposed optimization showed that it is possible to obtain Sr recovery of about 92% if 6 mol L-1 HCl is used as an elution solution. Horwitz, E. P. C. R. D. M. L. (1992). "A Novel Stronium-Selective Extraction Chromatographic Resin." Solvent Extration and Ion Exchange 210(2): 313-336.