Square Wave Voltammetry in the Determination of Ni2+ and Al3+ in Biological Samples

In this contribution, the amounts of Ni (nickel) and Al (aluminum) in tilapias ( Oreochromis niloticus ) were determined using square wave voltammetry (SWV) with glassy carbon working microelectrode with a mercury thin film, platinum counter electrode, and Ag/AgCl reference electrode. Ni was studied...

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Bibliographic Details
Published in:Analytical sciences 2008-11, Vol.24 (11), p.1443-1447
Main Authors: Paulino, Alexandre T., Vargas, Alexandro M. M., Santos, Lídia B., Nozaki, Jorge, Muniz, Edvani C., Tambourgi, Elias B.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Chemistry
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Summary:In this contribution, the amounts of Ni (nickel) and Al (aluminum) in tilapias ( Oreochromis niloticus ) were determined using square wave voltammetry (SWV) with glassy carbon working microelectrode with a mercury thin film, platinum counter electrode, and Ag/AgCl reference electrode. Ni was studied through the formation of the dimethylglyoxime-Ni (Ni-DMG) complex, while Al was studied through the formation of the Alizarin R-Al complex. The detection limit found for Ni-DMG and Alizarin R-Al complexes were 1.70 × 10 –7 and 1.0 × 10 –8 mol L –1 , respectively. The voltammetric anodic curves for the Alizarin R-Al complex were recorded over the potential range from–0.8 to–0.05 V while the voltammetric cathodic curve for the Ni-DMG complex was recorded over the potential range from–0.7 to–1.2 V. These methods detected low concentrations of Ni and Al in biological samples efficiently.
ISSN:0910-6340
1348-2246
DOI:10.2116/analsci.24.1443