Silver particles-modified carbon paste electrodes for differential pulse voltammetric determination of paraquat in ambient water samples

Farahi, A.; Achak, M.; Gaini, L. El; Mhammedi, M.A. El; Bakasse, M.

doi:10.1016/j.jaubas.2014.06.011

Cited by 14 publications

(11 citation statements)

References 25 publications

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“…in the blank media. The reported detection limits are comparable to the previously reported methodology (Table 1) [30][31][32][33][34][35] and lower than the maximum value established by the United States Environmental Protection Agency (EPA) in drinking water.…”

Section: Calibration Graphsupporting

confidence: 81%

Electrochemical determination of paraquat in potato, lemon, orange and natural water samples using sensitive-rich clay carbon electrode

Kasmi¹,

Lahrich

Farahi

et al. 2016

Journal of the Taiwan Institute of Chemical Engineers

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Section: Calibration Graphsupporting

confidence: 81%

Electrochemical determination of paraquat in potato, lemon, orange and natural water samples using sensitive-rich clay carbon electrode

Kasmi¹,

Lahrich

Farahi

et al. 2016

Journal of the Taiwan Institute of Chemical Engineers

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“…Moreover, this method is simple and fast as compared to other voltammetric methods using modified electrodes. 8,26,27) …”

Section: Validation Of the Proposed Methodsmentioning

confidence: 99%

A simple voltammetric determination of metsulfuron-methyl in water samples using differential pulse cathodic stripping voltammetry

2017

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The voltammetric determination of metsulfuron-methyl, a type of pesticide, was investigated on a hanging mercury drop electrode using a differential pulse cathodic stripping voltammetry technique. The experimental parameters, such as the pH of the Britton-Robinson buffer, accumulation time, accumulation potential and initial potential were optimized for the metsulfuronmethyl determination. A well-defined reduction peak was observed at pH 2.0 to 4.0 in the potential range of −0.75 to −1.0 V. The pH of 2.0 was chosen as the optimum pH due to a good stripping signal of the reduction peak. There were no significant interfering ion effects on the electroanalysis of metsulfuron-methyl. The optimized parameters were then used to determine metsulfuron-methyl in the commercial pesticide Ally. The proposed method was highly sensitive due to the lower limit of determination (0.04 mg/L), being relatively selective, and consisting of good precision. The recovery values achieved were about 93% in water samples for this analysis.

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“…It is well known that AgNPs exhibit a high catalytic activity for the reduction of H 2 O 2 [27]. Five hundred milligrams of graphite sample and 0.75 g paraffin wax were mixed uniformly with 0.65 g rGO and 0.1 g AgNPs at a temperature of 60 • C [28]. The mixture was put into a rectangular mould, and a copper wire (5.96 × 10 7 S m −1 at 20 • C) was inserted in the centre.…”

Section: Fabrication Of Rgo/agnps Electrodementioning

confidence: 99%

Bio-inspired AgNPs, multilayers-reduced graphene oxide and graphite nanocomposite for electrochemical $$\hbox {H}_{2}{\hbox {O}}_{2}$$ H 2 O 2

et al. 2018

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A bio-mediated route for the synthesis of silver nanoparticles (AgNPs) is an area of interest in research of many scientists, and this work aims to study the electrocatalytic activity of these particles during electrochemical sensing of H 2 O 2 in a phosphate buffer media. The composite electrodes were fabricated using nearly spherical AgNPs and reduced graphene oxide (rGO) with the graphite (99.999% purity) support made of graphite paste. Graphene oxide (GO) was first synthesized using the modified Hummers method followed by rGO synthesis by chemical reduction of GO. rGO is consisting of about nine layers of rGO sheets of a wrinkled surface morphology with an intensity ratio of D to G band (I D /I G) of 1.17 and an interplanar d-spacing of 0.36 nm as evidenced by HRTEM micrograph. There was about 10 times increase in the cell current with the AgNPs-impregnated composite-electrode compared to without AgNPs impregnation, and an overpotential of H 2 O 2 reduction was found to be −1.373 V with a detection limit of 19.04 μM and 95.3% electrode stability with the graphite-rGO-AgNPs composite electrode. A nafion membrane cast on the rGO-AgNPs prevented the leakage of this composite from the electrode surface. The interference of various electroactive compounds on the amperometric response of the graphite-rGO-AgNPs electrode was also investigated.

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Silver particles-modified carbon paste electrodes for differential pulse voltammetric determination of paraquat in ambient water samples

Cited by 14 publications

References 25 publications

Electrochemical determination of paraquat in potato, lemon, orange and natural water samples using sensitive-rich clay carbon electrode

Electrochemical determination of paraquat in potato, lemon, orange and natural water samples using sensitive-rich clay carbon electrode

A simple voltammetric determination of metsulfuron-methyl in water samples using differential pulse cathodic stripping voltammetry

Bio-inspired AgNPs, multilayers-reduced graphene oxide and graphite nanocomposite for electrochemical $$\hbox {H}_{2}{\hbox {O}}_{2}$$ H 2 O 2

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