Resumo

PORTELA, Maria Inês; CAPELO, Sofia  e  PINHEIRO, José Paulo. Voltammetric Behaviour of Cu-NTA and Pb-NTA on a Mercury Iridiun Microelectrode Coated with Agarose. Port. Electrochim. Acta [online]. 2004, vol.22, n.1, pp.43-54. ISSN 0872-1904.

The complexation of nitriloacetic acid (NTA) with copper and lead was studied by square wave stripping voltammetry (SWSV) using a mercury iridium microelectrode as the working electrode. The results show that NTA interfere with the measurements, but if the mercury iridium microelectrode is coated with different concentrations of agarose (0.75%, 1.5% and 15% w/v) this interference is greatly minimized. The best results were obtained with 1.5% agarose.

Palavras-chave : NTA; iridium microelectrodes; copper, lead; agarose; PLM.

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