Square wave voltammetry in the determination of Ni2+ and Al3+ in biological sample.

Paulino, Alexandre T; Vargas, Alexandro M M; Santos, Lídia B; Nozaki, Jorge; Muniz, Edvani C; Tambourgi, Elias B

Paulino, Alexandre T; Vargas, Alexandro M M; Santos, Lídia B; Nozaki, Jorge; Muniz, Edvani C; Tambourgi, Elias B.

Afiliação

Paulino AT; Universidade Estadual de Campinas, Departamento de Sistemas Químicos, Faculdade de Engenharia Química, Campinas-São Paulo, Brazil. atpaulino10@gmail.com

Anal Sci ; 24(11): 1443-7, 2008.

Article em En | MEDLINE | ID: mdl-18997373

RESUMO

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(-7) and 1.0 x 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.

Assuntos

Alumínio/análise; Monitoramento Ambiental/métodos; Níquel/análise; Animais; Antraquinonas/química; Peixes; Microeletrodos; Oximas/química; Potenciometria

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Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Monitoramento Ambiental / Alumínio / Níquel Limite: Animals Idioma: En Revista: Anal Sci Ano de publicação: 2008 Tipo de documento: Article País de afiliação: Brasil País de publicação: Suíça

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