Abstract
Cyclic and square wave voltammetric measurements were performed to deduce the electrochemical behavior of fomesafen herbicide on the prepared carbon nanotube paste electrodes. Fomesafen has created a well-defined cathodic peak at −540 mV (vs. Ag/AgCl), but no corresponding oxidation peak has appeared on the reverse scan. The influence of the pH on the electro-reduction peak was tested at various pH values, and the E p versus pH plot suggested that protons are involved in reduction process. Electrochemical studies showed that –NO2 group was responsible for the reduction process. A linear relationship has been constructed in the concentration range of 0.30–40 mg/L. The limits of detection and quantification values were obtained as 0.089 and 0.297 mg/L, respectively. Fomesafen was determined in the presence of some well-known pesticides, and the extent of recoveries of 5 mg/L fomesafen in the presence of equal amounts of pesticides anilazine, pymetrozine, and triflumizole was 103.7 ± 0.9, 94.3 ± 0.4, and 97.9 ± 0.5 %, respectively (n = 3). The accuracy of the recommended method was further proved by the determination of fomesafen in spiked real samples such as apricot juice, cherry juice, and lake water with a relative error of −4.2, −2.8, and −1.8 %, respectively. The obtained results suggest that the recommended method is sufficiently accurate, selective, and precise.
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Recai İnam declares that he has no conflict of interest. Ersin Demir declares that he has no conflict of interest.
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Demir, E., İnam, R. Square Wave Voltammetric Determination of Fomesafen Herbicide Using Modified Nanostructure Carbon Paste Electrode as a Sensor and Application to Food Samples. Food Anal. Methods 10, 74–82 (2017). https://doi.org/10.1007/s12161-016-0551-1
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DOI: https://doi.org/10.1007/s12161-016-0551-1