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  • Author or Editor: Nóra Vajda x
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Abstract  

A great number of analytical methods have been developed and applied for the determination of 241Am isotope in environmental and nuclear samples using various measuring techniques, i.e. alpha and gamma spectrometry, liquid scintillation counting and mass spectrometry. This paper is intended to give an overview about the development of the radiochemical procedures for the separation of americium starting with a brief description of the analytical procedures from the “historic” times, followed by a more detailed discussion of the recent developments from the middle of 1990s till 2009 and giving an outlook to the procedures under development aiming the technological separation of americium from radioactive wastes and process solutions for purposes of partitioning of minor actinides. Nuclear measuring techniques and mass spectrometric techniques will be comparatively evaluated.

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Abstract  

A great number of analytical methods have been developed and applied for the determination of plutonium isotopes in environmental and nuclear samples using alpha spectrometry. This paper is intended to give an overview about the development of the radiochemical procedures for the separation of plutonium starting with a brief description of the “historic” procedures from the early times of nuclear industry followed by a more detailed discussion of the recent developments from the nineties till 2008. Nuclear measuring techniques i.e. semiconductor alpha spectrometry and liquid scintillation counting are critically discussed. Capabilities of these techniques are compared with those of mass spectrometric techniques.

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Abstract  

The presence of 89Sr and 90Sr in the biosphere constitutes a biological hazard. There are several analytical methods for the determination of 89Sr and 90Sr. Three analytical methods of various application fields using selective Sr resin for Sr separation and DGA resin for Y separation and measuring techniques, i.e. liquid scintillation spectrometry and Cerenkov counting are discussed in the paper. The calculation techniques are compared in the aspects such as trueness and accuracy of the results and the limit of detection. Uncertainties and detection limits are calculated using the spreadsheet method.

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