Analytical Sciences
Online ISSN : 1348-2246
Print ISSN : 0910-6340
ISSN-L : 0910-6340
Original Papers
Square Wave Voltammetry in the Determination of Ni2+ and Al3+ in Biological Sample
Alexandre T. PAULINOAlexandro M. M. VARGASLídia B. SANTOSJorge NOZAKIEdvani C. MUNIZElias B. TAMBOURGI
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2008 Volume 24 Issue 11 Pages 1443-1447

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Abstract

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.

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© 2008 by The Japan Society for Analytical Chemistry
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