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Measurement of total selenium and selenium(IV) in seawater by stripping chronopotentiometry

Abstract : We developed a stripping chronopotentiometric method (constant current stripping analysis, CCSA) with a mercury film electrode for selenium quantification in seawater. A sensitivity and detection limit of 222 ms ng–1 l and 4 ng l–1 (50 pM), respectively, were accomplished for a 3-min electrolysis time. Compared to the other chronopotentiometric methods available for a single selenium measurement only in natural waters, our procedure exhibits a ten times better sensitivity. It, therefore, allows one to reach the current concentration thresholds found in coastal and oceanic waters (30–200 ng l–1). Moreover, a simple change in operating conditions enables one to also quantify Se(IV), a toxic dissolved species. With respect to the other electrochemical methods of current use, our procedure is beneficial because of its ease-of-use: it needs neither degassing step, nor catalyser.
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Contributor : Matthieu Waeles Connect in order to contact the contributor
Submitted on : Thursday, January 28, 2010 - 3:55:15 PM
Last modification on : Tuesday, May 10, 2022 - 3:25:40 PM


  • HAL Id : hal-00451253, version 1



Ricardo D. Riso, Matthieu Waeles, Sébastien Garbarino, Pierre Le Corre. Measurement of total selenium and selenium(IV) in seawater by stripping chronopotentiometry. Analytical and Bioanalytical Chemistry, 2004, 379, pp.1113. ⟨hal-00451253⟩



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