Abstract: Two types of bismuth modified electrodes, a bismuth-film modified glassy carbon (BiF-GCE) and a bismuth bulk modified carbon paste, were applied for the determination of selected nitroguanidine neonicotinoid insecticides. The method based on an ex situ prepared BiF-GCE operated in the differential pulse voltammetric (DPV) mode was applied to determine clothianidin in the concentration range from 2.5 to 23 μg cm−3 with a relative standard deviation (RSD) not exceeding 1.5%. The tricresyl phosphate-based carbon paste electrodes (TCP-CPEs), bulk modified with 5 and 20 w/w% of bismuth, showed a different analytical performance in the determination of imidacloprid, regarding the peak shape, potential window, and noise level. The TCP-CPE with 5% Bi was advantageous, and the developed DPV method based on it allowed the determination in the concentration range from 1.7 to 60 μg cm−3 with an RSD of 2.4%. To get a deeper insight into the morphology of the bismuth-based sensor surfaces, scanning electron microscopic measurements were performed of both the surface film and the bulk modified electrodes.
Keywords: bismuth modified electrodes; voltammetry; neonicotinoids; clothianidin; imidacloprid
Export to BibTeX
MDPI and ACS Style
Guzsvány, V.; Papp, Z.; Zbiljić, J.; Vajdle, O.; Rodić, M. Bismuth Modified Carbon-Based Electrodes for the Determination of Selected Neonicotinoid Insecticides. Molecules 2011, 16, 4451-4466.
Guzsvány V, Papp Z, Zbiljić J, Vajdle O, Rodić M. Bismuth Modified Carbon-Based Electrodes for the Determination of Selected Neonicotinoid Insecticides. Molecules. 2011; 16(6):4451-4466.
Guzsvány, Valéria; Papp, Zsigmond; Zbiljić, Jasmina; Vajdle, Olga; Rodić, Marko. 2011. "Bismuth Modified Carbon-Based Electrodes for the Determination of Selected Neonicotinoid Insecticides." Molecules 16, no. 6: 4451-4466.