Affiliation:
1. Vienna University of Technology, Atominstitut, Vienna, Austria
2. Department of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins, USA
Abstract
We investigated the interference of radiolead in the isolation of
radiostrontium using a strontium-specific resin by means of 85Sr and 212Pb
radiotracers. The resin was found to be almost equally specific for lead ions
as well. Elution of Pb2+, however, was found to occur at very low acid
concentrations (?0.02 M HNO3) of the elutant. Even with pure distilled water
as the elutant, elution of lead cannot compete with strontium, due to the
delayed elution dynamics caused by residual acid in the column. In contrast
to strontium, which is eluted quickly from the column and almost
quantitatively after 4 mL elutant (practically independently of the acid
concentration of the elutant), lead is eluted with much delay and not
completely after the 10 mL elution. The Eichrom method for the determination
of radiostrontium in water proposes elution with 0.05 M HNO3, which was found
extremely useful, because at such an acid concentration, no radiolead is
eluted from the column and allows the production of a pure radiostrontium
fraction which can be measured by liquid scintillation counting.
Publisher
National Library of Serbia
Subject
Safety, Risk, Reliability and Quality,Nuclear Energy and Engineering
Cited by
14 articles.
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