Selenium and Selenium Species: Analytical Techniques and Speciation Methods
M. Ochsenkühn-Petropoulou , F. Tsopelas , Lena Ruzik , K. Bierla , J. Szpunar
AbstractThe substantial differences in toxicity, environmental mobility and toxicity among different trace elements' species have forced elemental speciation to be an essential part of biological, nutritional and environmental sciences. From an environmental point of view, results of elemental speciation can be utilized to gain inside into the processes involved in cycling, degradation, transformation and fate of trace elements in the environment. Elemental species of environmental interest can be either of purely inorganic nature, such as Se(IV), Se(VI), As(III), As(V) or organometallic ones, such as butyltins and phenyltins. The advent of instrumental methods of chemical analysis has made possible the rapid, sensitive and selective quantification of elemental species in ultratrace levels even in complex matrices, such as environmental samples. In the present chapter, the strategy for elemental speciation in environmental matrices is presented with particular emphasis in the case of tin and selenium species. It generally involves sample collection and storage, determination of total elemental content, extraction of species of interest from the matrices, separation and preconcentration techniques and final detection. Quality control of speciation approaches also constitutes an important issue and the limited number of commercially available certified reference materials (CRMs) for individual elemental species can be overcome by intercomparison exercises or the implementation of isotope dilution analysis. Miniaturization of analytical devices for trace elements studies and the development of portable analytical devices for in-situ measurements are promising trends for future developments in the field of elemental speciation analysis.
|Publication size in sheets||2.15|
|Book||Michalke B. (eds.): Metallomics: Analytical Techniques and Speciation Methods, 2016, Wiley-VCH Verlag GmbH & Co. KGaA, ISBN 978-3-527-33969-3, 496 p.|
|Keywords in English||elemental speciation; extraction; separation; preconcentration; liquid chromatography; voltammetric techniques; tin speciation; selenium speciation; environmental matrices; extraction; separation; preconcentration; liquid chromatography; voltammetric techniques|
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