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Orientador(es)
Resumo(s)
An electrochemical sensor has been developed for the determination of the herbicide bentazone, based on a GC
electrode modified by a combination of multiwalled carbon nanotubes (MWCNT) with b-cyclodextrin (b-CD) incorporated
in a polyaniline film. The results indicate that the b-CD/MWCNT modified GC electrode exhibits efficient
electrocatalytic oxidation of bentazone with high sensitivity and stability. A cyclic voltammetric method to determine
bentazone in phosphate buffer solution at pH 6.0, was developed, without any previous extraction, clean-up,
or derivatization steps, in the range of 10–80 mmolL 1, with a detection limit of 1.6 mmolL 1 in water. The results
were compared with those obtained by an established HPLC technique. No statistically significant differences being
found between both methods.
Descrição
Palavras-chave
Herbicides Bentazone Voltammetric sensors b-Cyclodextrin Carbon nanotubes