Chitosan-magnetite nanocomposite as a sensing platform to bendiocarb determination

A novel platform for carbamate-based pesticide quantification using a chitosan/magnetic iron oxide (Chit-Fe3O4) nanocomposite as a glassy carbon electrode (GCE) modifier is shown for an analytical methodology for determination of bendiocarb (BND). The BND oxidation signal using GCE/Chit-Fe3O4 compared with bare GCE was catalyzed, showing a 37.5% of current increase with the peak potential towards less positive values, showing method's increased sensitivity and selectivity. Using square-wave voltammetry (SWV), calibration curves for BND determination were obtained (n = 3), and calculated detection and quantification limits values were 2.09 × 10-6 mol L-1 (466.99 ppb) and 6.97 × 10-6 mol L-1 (1555.91 ppb), respectively. The proposed electroanalytical methodology was successfully applied for BND quantification in natural raw waters without any sample pretreatment, proving that the GCE/Chit-Fe3O4 modified electrode showed great potential for BND determination in complex samples. ᅟ Graphical abstract.

Palavras-chave

Bendiocarb Magnetic nanoparticles Nanocomposite Chitosan Electrochemical sensor

URI

http://hdl.handle.net/10400.22/14572

Citação

Oliveira, R.C. de, Sousa, C.P., Freire, T.M. et al. Anal Bioanal Chem (2018) 410: 7229. https://doi.org/10.1007/s00216-018-1330-1

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Editora

Springer Verlag

DOI

10.1007/s00216-018-1330-1

Coleções

ISEP – GRAQ – Artigos

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