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Speciation of inorganic arsenic and selenium in contaminated ground water samples - distribution and long-term stability of species

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Zitation

Raessler, M., Michalke, B., Schramel, P., Schulte-Hostede, S., & Kettrup, A. (1998). Speciation of inorganic arsenic and selenium in contaminated ground water samples - distribution and long-term stability of species. International Journal of Environmental Analytical Chemistry, 72(3), 195-203.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000E-E145-A
Zusammenfassung
This paper presents the results of speciation studies of arsenic and selenium in contaminated ground water samples from Kelheim/Germany. Results are based on separation of ions by HPLC using a phosphate buffer. The separated species were collected in fractions and analysed element-specifically by HG- AAS. Dominating species were arsenate and selenate, while arsenite and selenite were less important. Long-term studies revealed that As (V), Se (IV) and Se (VI) remained stable for up to 12 months, whereas oxidation of As (III) was observed after 3 months.