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Lead Film Electrode Prepared with the Use of a Reversibly Deposited Mediator Metal in Adsorptive Stripping Voltammetry of Nickel |
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| Authors: | Katarzyna Tyszczuk‐Rotko Radovan Metelka Karel Vyt?as Mariusz Barczak |
| Institution: | 1. Maria Curie‐Sklodowska University, Faculty of Chemistry, Department of Analytical Chemistry and Instrumental Analysis, 20‐031 Lublin, Poland tel: +48?81?5375585;2. fax: +48?81?5333348;3. University of Pardubice, Faculty of Chemical Technology, Department of Analytical Chemistry, 53210 Pardubice, Czech Republic;4. Maria Curie‐Sklodowska University, Faculty of Chemistry, Department of Theoretical Chemistry, 20‐031 Lublin, Poland |
| Abstract: | The paper presents the first report on application of a “hybrid” lead film electrode for the adsorptive stripping voltammetric determination of Ni(II) in the presence of nioxime as a complexing agent. The strategy to create a “hybrid” electrode is based on the combination of ex situ and in situ plating methods and the use of a reversibly deposited mediator metal (Zn) for the lead film formation. The surface morphology of a new sensor was characterized by atomic force microscopy. The detection limit for Ni(II) obtained at 120 s of accumulation time was 3.9×10?11 mol L?1. The proposed method was validated for the determination of nickel in water certified reference materials with good results. |
| Keywords: | Hybrid lead film electrode Mediator metal Ni(II) determination Adsorptive stripping voltammetry |