Accurate determination of cobalt traces in several biological reference materials |
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Authors: | Dybczyński Rajmund Danko Bożena |
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Institution: | 1.Department of Analytical Chemistry, Institute of Nuclear Chemistry & Technology, ul. Dorodna 16, 03-195, Warszawa, Poland ; |
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Abstract: | A newly devised, very accurate (“definitive”) method for the determination of trace amounts of cobalt in biological materials
was validated by the analysis of several certified reference materials. The method is based on a combination of neutron activation
and selective and quantitative postirradiation isolation of radiocobalt from practically all other radionuclides by ion-exchange
and extraction chromatography followed by γ-ray spectrometric measurement. The significance of criteria that should be fulfilled
in order to accept a given result as obtained by the “definitive method” is emphasized. In view of the demonstrated very good
accuracy of the method, it is suggested that our values for cobalt content in those reference materials in which it was originally
not certified (SRM 1570 spinach, SRM 1571 orchard leaves, SRM 1577 bovine liver, and Czechoslovak bovine liver 12-02-01) might
be used as provisional certified values. |
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Keywords: | Index Entries" target="_blank">Index Entries Determination of cobalt RNAA definitive methods biological materials certified reference materials |
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