Bismuth Modified Carbon-Based Electrodes for the Determination of Selected Neonicotinoid Insecticides
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 p...
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doaj-468fbb647a424130a4575a63849cdc2f2020-11-24T23:21:53ZengMDPI AGMolecules1420-30492011-05-011664451446610.3390/molecules16064451Bismuth Modified Carbon-Based Electrodes for the Determination of Selected Neonicotinoid InsecticidesMarko RodićOlga VajdleValéria GuzsványJasmina ZbiljićZsigmond PappTwo 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. http://www.mdpi.com/1420-3049/16/6/4451/bismuth modified electrodesvoltammetryneonicotinoidsclothianidinimidacloprid |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Marko Rodić Olga Vajdle Valéria Guzsvány Jasmina Zbiljić Zsigmond Papp |
spellingShingle |
Marko Rodić Olga Vajdle Valéria Guzsvány Jasmina Zbiljić Zsigmond Papp Bismuth Modified Carbon-Based Electrodes for the Determination of Selected Neonicotinoid Insecticides Molecules bismuth modified electrodes voltammetry neonicotinoids clothianidin imidacloprid |
author_facet |
Marko Rodić Olga Vajdle Valéria Guzsvány Jasmina Zbiljić Zsigmond Papp |
author_sort |
Marko Rodić |
title |
Bismuth Modified Carbon-Based Electrodes for the Determination of Selected Neonicotinoid Insecticides |
title_short |
Bismuth Modified Carbon-Based Electrodes for the Determination of Selected Neonicotinoid Insecticides |
title_full |
Bismuth Modified Carbon-Based Electrodes for the Determination of Selected Neonicotinoid Insecticides |
title_fullStr |
Bismuth Modified Carbon-Based Electrodes for the Determination of Selected Neonicotinoid Insecticides |
title_full_unstemmed |
Bismuth Modified Carbon-Based Electrodes for the Determination of Selected Neonicotinoid Insecticides |
title_sort |
bismuth modified carbon-based electrodes for the determination of selected neonicotinoid insecticides |
publisher |
MDPI AG |
series |
Molecules |
issn |
1420-3049 |
publishDate |
2011-05-01 |
description |
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. |
topic |
bismuth modified electrodes voltammetry neonicotinoids clothianidin imidacloprid |
url |
http://www.mdpi.com/1420-3049/16/6/4451/ |
work_keys_str_mv |
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