A method for the determination of technetium in environmental waters |
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| Authors: | P Robb P Warwick D J Malcolme-Lawes |
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| Institution: | (1) Loughborough University of Technology Leicestershire, (England);(2) King's College, University of London, London, (England) |
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| Abstract: | A method is described which can be used to determine technetium-99 levels in a range of water types. Ruthenium isotopes which may interfere in the analysis are removed from the sample by precipitation before concentration of pertechnetate onto an ion-exchange column. Other nuclides can be removed from the column using NaOH before elution of the technetium using NaSCN. The technetium in the NaSCN eluent can then be extracted into butan-2-one which can be evaporated onto a planchette. Technetium-99m is used as a yield tracer and after this has decayed away to negligible levles the amount of technetium on the planchette can be determined by measuring the rate of beta radiation emission from the final concentrate. |
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