Strontium
isolation from natural samples with Sr resin and subsequent determination of 90Sr</p>
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Authors: | ? Grahek K Ko?uti? M Ro?mari?-Ma?efat |
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Institution: | 15201. Centre for Marine and Environmental Research, Rudjer Bo?kovi? Institute, Bijeni?ka 54, 10000 Zagreb, Croatia 15202. Centre for Marine and Environmental Research, Rudjer Bo?kovi? Institute, Bijeni?ka 54, 10000 Zagreb, Croatia 15203. Centre for Marine and Environmental Research, Rudjer Bo?kovi? Institute, Bijeni?ka 54, 10000 Zagreb, Croatia
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Abstract: | The
reliability of an 90Sr determination method was tested using an Sr
extraction chromatographic resin for strontium isolation. The 90Sr-content
in samples of vegetables, soil and water (obtained from Environmental
Measurement Laboratory, USA) were determined and the results were controlled by
classical methods and by using an anion-exchanger and an alcohol solution of
nitric acid for the strontium isolation. These methods were previously tested
by determining 90Sr in IAEA 326 and 327 samples of soil. It is shown
that the isolation process with Sr resin is simpler and faster than the
classical and mixed solvent anion-exchange methods. The efficiency of isolation
on a Sr column depends on the resin quantity and separation conditions; and is
the highest with a Sr column, compared to the classical and anion-exchange
methods. Experimental data and theoretical models were used to calculate the
parameters that enable the estimation of optimum dimensions of the column for
isolation. A simple relation is proposed for the calculation of breakthrough
volume, which defines the sample and eluent volumes for an optimal strontium
isolation.</p>
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