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- Title
Bismuth Modified Carbon-Based Electrodes for the Determination of Selected Neonicotinoid Insecticides.
- Authors
Guzsvány, Valéria; Papp, Zsigmond; Zbiljić, Jasmina; Vajdle, Olga; Rodić, Marko
- 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 phosphatebased 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.
- Subjects
ELECTRODES; NEONICOTINOIDS; NITROGUANIDINE; INSECTICIDES; CLOTHIANIDIN; BISMUTH; IMIDACLOPRID
- Publication
Molecules, 2011, Vol 16, Issue 6, p4451
- ISSN
1420-3049
- Publication type
Article
- DOI
10.3390/molecules16064451