Square wave voltammetric determination of methiocarb insecticide based on multiwall carbon nanotube paste electrode

Cyclic voltammogram of methiocarb in 0.1 M H 2 SO 4 exhibited an irreversible anodic peak at about +1285 mV versus Ag/AgCl. Electro-oxidation and determination of methiocarb in spiked soil, river water and agrochemical formulation were realized on a newly prepared carbon-nanotube paste electrode by...

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Bibliographic Details
Published in:Journal of applied electrochemistry 2013-04, Vol.43 (4), p.425-432
Main Authors: İnam, Recai, Bilgin, Cansu
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Electrochemistry
Electrodes
Formulations
Industrial Chemistry/Chemical Engineering
Mathematical analysis
Original Paper
Oxidation
Pastes
Physical Chemistry
Rivers
Soil (material)
Square waves
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Summary:Cyclic voltammogram of methiocarb in 0.1 M H 2 SO 4 exhibited an irreversible anodic peak at about +1285 mV versus Ag/AgCl. Electro-oxidation and determination of methiocarb in spiked soil, river water and agrochemical formulation were realized on a newly prepared carbon-nanotube paste electrode by applying square wave voltammetry (SWV). The d E p /d p H value indicated that the oxidation mechanism involved the coupling of H + with the oxidation process. The peak signals were linearly related to methiocarb concentration in the range of 1.5–59.1 mgL −1 with a detection limit of 0.45 mgL −1 . The accuracy and selectivity of the proposed method were shown by calculating the recoveries of methiocarb from soil, river water and pesticide formulation Mesurol ® . The calculated percent recoveries for soil and river water samples spiked with 30.0 μg g −1 and 40.0 μg mL −1 levels were 99.3 ± 1.2 and 98.5 ± 0.3 at 95 % confidence limit, respectively.
ISSN:0021-891X
1572-8838
DOI:10.1007/s10800-013-0526-5