Differential pulse voltammetric determination of fenobucarb at the glassy carbon electrode, after its alkaline hydrolysis to a phenolic product

Cabanillas, Agustina Guiberteau; Galeano-Dı́az, Teresa; Salinas, F.; Ortíz, Juan Manuel; Kauffmann, J.M.

doi:10.1002/elan.1140091218

Cited by 13 publications

(9 citation statements)

References 15 publications

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“…Despite the use of voltammetric methods for the determination of carbamate pesticides in general [7][8][9][10][11][12], no work is available for diethofencarb in this regard. To our knowledge, this is the first voltammetric report for determination of diethofencarb using multiwall carbon nano tube paste electrode (MWCNTPE).…”

Section: Scheme 1 Structure Of Diethofencarbmentioning

confidence: 99%

Determination of diethofencarb (isopropyl 3,4-diethoxyphenylcarbamate) by square wave voltammetry using a multiwall carbon nanotube paste electrode

Akbaş

İnam

2015

Anal. Methods

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Diethofencarb fungicide has been studied by square wave voltammetry (SWV) on multi wall carbon nanotube paste electrode (MWCNTPE). The peak potentials have been shifted to more negative direction with increasing pH, showıng us a maximum peak response at + 861 mV (vs.Ag/AgCl) and pH 2.0. Operational parameters affecting sensitivity and selectivity such as accumulation potential (E acc ), accumulation time (t acc ), frequency (f) and pulse amplitude have been optimized. The constructed calibration curve was linear within the concentration range of 2.50 µg mL -1 and 30.5µg mL -1 . The calculated limit of detection (LOD) and limit of quantification (LOQ) values were 0.77µg/mL and 2.57µg/mL, respectively. Its determination were realized in the presence various fungicides to put forth the selectivity, accuracy and applicability of the recommended method. The spiked tomato juice samples with 2.50 -7.50 µg mL -1 diethofencarb were subjected to the proposed method and recoveries over 97% and relative standard deviations less than 3.8% reflected a high degree of accuracy and precision.

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Section: Scheme 1 Structure Of Diethofencarbmentioning

confidence: 99%

Determination of diethofencarb (isopropyl 3,4-diethoxyphenylcarbamate) by square wave voltammetry using a multiwall carbon nanotube paste electrode

Akbaş

İnam

2015

Anal. Methods

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“…Table 1 shows a short review of electroanalytical procedures developed for the determination of pesticides on glassy carbon electrodes [19,[21][22][23][24][25][26][27][28][29][30][31][32]. As it can be seen, most of the determinations were based on the oxidation of the parent product on the electrode surface, whereas some carbamate insecticides could only be determined by electroanalytical methods after their alkaline hydrolysis to a phenolic product, which can be easily oxidised on the glassy carbon electrode.…”

Section: Introductionmentioning

confidence: 99%

Direct electroanalytical determination of methylparathion in solution extracted from soil

Simões

Toledo

Rodrigues

et al. 2009

International Journal of Environmental Analytical Chemistry

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A fast and simple electroanalytical procedure was applied for the determination of methylparathion in a solution extracted from a typical Brazilian soil using square wave voltammetry and a glassy carbon electrode. The effects of pH, scan rate and surface poisoning were studied in order to establish the optimum conditions for the electroanalysis of methylparathion. It was observed that the substances commonly presented in the soil solution modify the voltammograms, which improves the current values and displaces the peak potential to a less negative value. This was attributed to the more alkaline pH caused by dissolved organic matter, mineral colloids and other substances in the soil solution. The best response was obtained in neutral or in slightly acidic solutions. In such conditions, the limits of detection were 0.32 mg L À1 (1.21 Â 10 À6 mol L À1 ) in pure water and 0.36 mg L À1 (1.37 Â 10 À6 mol L À1 ) in the soil extracted solution.

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“…These composite electrodes acted as microarray-type electrodes and allowed the determination of carbamate and urea pesticides in natural water, operating in potentiostatic mode at 1.1 V (vs. Ag/AgCl) (4.0 mol L À1 KCl). Cabanillas et al [6] used a reticulated glassy carbon electrode to quantify carbamate in natural water without pretreatment employing differential pulse voltammetric method. After hydrolyzed in alkaline medium, the detection limit found was 3.68 Â 10 À6 mol L…”

Section: Introductionmentioning

confidence: 99%

Electroanalytical Determination of Carbaryl in Natural Waters on Boron Doped Diamond Electrode

et al. 2006

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The anodic voltammetric behavior of carbaryl on a boron-doped diamond electrode in aqueous solution is reported. The results, obtained by square-wave voltammetry at 0.1 mol L À1 Na 2 SO 4 and pH 6.0, allow the development of a method to determine carbaryl, without any previous step of extraction, clean-up, preconcentration or derivatization, in the range 2.5 -30.0 Â 10 À6 mol L À1, with a detection limit of 8.2 AE 0.2 mg L À1 in pure water. The analytical sensitivity of this electrochemical method diminished slightly, from 3.07 mA mmol À1 L to 2.90 mA mmol À1 L, when the electrolyte was prepared with water samples collected from two polluted points in an urban creek. In these conditions, the recovery efficiencies obtained were around 104%. The effect of other pesticides (fenthion and 4-nitrophenol) was evaluated and found to exert a negligible influence on carbaryl determination. The square-wave voltammetric data obtained for carbaryl were typical of an irreversible electrode process with mass transport control. The combination of square-wave voltammetry and diamond electrodes is an interesting and desirable alternative for analytical determinations.

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Differential pulse voltammetric determination of fenobucarb at the glassy carbon electrode, after its alkaline hydrolysis to a phenolic product

Cited by 13 publications

References 15 publications

Determination of diethofencarb (isopropyl 3,4-diethoxyphenylcarbamate) by square wave voltammetry using a multiwall carbon nanotube paste electrode

Determination of diethofencarb (isopropyl 3,4-diethoxyphenylcarbamate) by square wave voltammetry using a multiwall carbon nanotube paste electrode

Direct electroanalytical determination of methylparathion in solution extracted from soil

Electroanalytical Determination of Carbaryl in Natural Waters on Boron Doped Diamond Electrode

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