Square Wave Voltammetry in the Determination of Ni super(2+) and Al super(3+) in Biological Sample

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 t...

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Bibliographic Details
Published in:Analytical sciences 2008-01, Vol.24 (11), p.1443-1443
Main Authors: Paulino, Alexandre T, Vargas, Alexandro MM, Santos, Lidia B, Nozaki, Jorge, Muniz, Edvani C, Tambourgi, Elias B
Format: Article
Language:English
Subjects:
Brackish
Oreochromis niloticus
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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 x 10 super(-7) and 1.0 x 10 super(-8) mol L super(-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