Resumo

LARA SANDOVAL, Adriana Elizabeth; GARCIA COLMENARES, José Mauricio  e  CHAPARRO ACUNA, Sandra Patricia. Validation of the voltammetric method for the determination of residues of paraquat applied to potato crops. Acta Agron. [online]. 2015, vol.64, n.4, pp.336-341. ISSN 0120-2812.  https://doi.org/10.15446/acag.v64n4.44521.

Pesticides quantification is an expensive work and it is inaccessible for farmers and health authorities and supervisory entities. This paper describes a simple, economical and acsequible methodology for quantification of carbofuran, methomyl and mancozeb in potatoe (Solanum tuberosum). The square wave electrochemical voltammetric method to quantify Paraquat was validated. It used Britton-Robinson buffer as solution supporting electrolyte, working electrode glassy carbon, Ag/AgCl as reference electrode and platinum as counter electrode. Herbicidewas extracted from potato through solid-liquid partitionmethodology, the results obtained by voltammetry were compared with UV-Vis spectroscopy,and we can observe that voltammetric method generates accurate and reliable results. The proposed method was successfully applied to the determination of paraquat in potato samples with satisfactory results.

Palavras-chave : Agricultural products; detection; electrochemistry; herbicides; paraquat.

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