Sensitive determination of paraquat by square wave anodic stripping voltammetry with chitin modified carbon paste electrode

Harmoudi, H. El; Achak, M.; Farahi, A.; Lahrich, S.; Gaini, L. El; Abdennouri, Mohamed; Bouzidi, Abdelhamid; Bakasse, M.; Mhammedi, M.A. El

doi:10.1016/j.talanta.2013.04.002

Cited by 48 publications

(24 citation statements)

References 31 publications

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“…The optimum pH range was found between 7.14 and 8.71, with a maximum response at pH 7.50. The sensitivity decrease in acidic solution was accompanied with a decrease in reduction peaks, which is in close agreement with published results [37].…”

Section: Effect Of Measurement Conditions On Square Wave Responsessupporting

confidence: 93%

Electrochemical determination of paraquat in citric fruit based on electrodeposition of silver particles onto carbon paste electrode

Farahi

Achak

Gaini

et al. 2015

Journal of Food and Drug Analysis

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Carbon paste electrodes (CPEs) modified with silver particles present an interesting tool in the determination of paraquat (PQ) using square wave voltammetry. Metallic silver particle deposits have been obtained via electrochemical deposition in acidic media using cyclic voltammetry. Scanning electron microscopy and X-ray diffraction measurements show that the silver particles are deposited onto carbon surfaces in aggregate form. The response of PQ with modified electrode (Ag-CPE) related to Ag/CP loading, preconcentration time, and measuring solution pH was investigated. The result shows that the increase in the two cathodic peak currents (Peak 1 and Peak 2), under optimized conditions, was linear with the increase in PQ concentration in the range 1.0 × 10 mol/L to 1.0 × 10 mol/L. The detection limit and quantification limit were 2.01 × 10 mol/L and 6.073 × 10 mol/L, respectively for Peak 1. The precision expressed as relative standard deviation for the concentration level 1.0 × 10 mol/L (n = 8) was found to be 1.45%. The methodology was satisfactorily applied for the determination of PQ in citric fruit cultures.

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Section: Effect Of Measurement Conditions On Square Wave Responsessupporting

confidence: 93%

Electrochemical determination of paraquat in citric fruit based on electrodeposition of silver particles onto carbon paste electrode

Farahi

Achak

Gaini

et al. 2015

Journal of Food and Drug Analysis

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“…In the recent years, the SW voltammetry has emerged as a viable and cheap alternative to the expensive and time-consuming techniques (such as chromatography, or spectrophotometry, for example) for the determination of inorganic and biologically important compounds. The simple working set-up, the quick time of performing the measurements, the different modes that can be applied, together with its sensitivity, make the SWV a technique of choice for quantification of important classes of compounds such as proteins [82], vitamins [83], phenols [84][85][86][87][88], benzoquinones [89], pesticides, herbicides and fungicides [90][91][92][93][94][95][96][97][98], alkaloids [99], terpenoids [100], heavy metals [101][102][103][104][105][106][107][108][109][110][111][112][113][114][115][116], and drugs [117,118]. One of the most valuable ability of SWV is its application for simultaneous determination of compounds with similar structures present in various pharmaceutical and physiological samples.…”

Section: Analytical and Biochemical Applications Of Square-wave Voltamentioning

confidence: 99%

Square‐Wave Voltammetry: A Review on the Recent Progress

et al. 2013

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A review on the recent progress of square-wave voltammetry is presented, covering the period of the last five years. The review addresses the new theoretical development of the technique as well as its application for mechanistic purposes, electrode kinetic measurements, biochemical and analytical applications. Besides, a few novel methodological modifications are proposed that might expand the scope and application of the technique.

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“…The maximum peak current was found at E acc =−0.5 V for MSM on the HMDE, indicating maximum accumulation of MSM on the surface of HMDE at this potential. 24,25) The effect of the initial potential, E i on MSM was inspected in a BR buffer at pH 2.0 by observing the effects of E i on the peak current. Fig.…”

Section: Effect Of Operating Parametersmentioning

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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Sensitive determination of paraquat by square wave anodic stripping voltammetry with chitin modified carbon paste electrode

Cited by 48 publications

References 31 publications

Electrochemical determination of paraquat in citric fruit based on electrodeposition of silver particles onto carbon paste electrode

Electrochemical determination of paraquat in citric fruit based on electrodeposition of silver particles onto carbon paste electrode

Square‐Wave Voltammetry: A Review on the Recent Progress

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

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