Comparison of different flow-through adsorptive stripping voltammetric methods for the determination of molybdenum(VI) |
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Authors: | Sylvia Sander |
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Institution: | (1) Institut für Anorganische und Analytische Chemie, TU-Clausthal, Paul-Ernst-Strasse 4, D-38678 Clausthal-Zellerfeld, Germany e-mail: sylvia.sander@tu-clausthal.de, DE |
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Abstract: | Four different complexing reagents namely chloranilic acid, oxine, tropolone, and cupferron were applied for AdSV determinations
of molybdenum. The parameters for the determination using a flow-through cell with a hanging mercury drop (HMDE) as working
electrode were examined systematically for all four systems and evaluated. Cyclic voltammograms were recorded to examine the
electrode reaction, alternating current (AC) voltammetry was used to determine adsorption processes. The comparison includes
sensitivity, detection limit, linear concentration range, the susceptibility to interference by organic compounds or foreign
ions, and the applicability to sea and tap water samples. The interpretation of the electrode reaction mechanism for the reduction
of the Mo cupferron complex published from Jiao et al. 10] was improved.
Received: 12 February 1999 / Revised: 10 May 1999 / Accepted: 14 May 1999 |
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