Cathodic stripping voltammetry of clothianidin: Application to environmental studies

Guziejewski, Dariusz; Skrzypek, Sławomira; Łuczak, Adam; Ciesielski, Witold

doi:10.1135/cccc2010116

Cited by 20 publications

(17 citation statements)

References 24 publications

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“…The electrochemical study on the behavior of CLT was extended. This pesticide is not only electrochemically active at the hanging mercury drop electrode on account of nitro group reduction (Guziejewski et al 2011), but it also exhibits effective catalytic activity toward hydrogen evolution reaction, which is the basis for its quantitative voltammetric determination performed in this work. Comparing the analytical utility and performances of the both clothianidin determination methods, it is seen that the presented one broadens the concentration range from 9×10 −9 to 4×10 −6 mol L −1 .…”

Section: Discussionmentioning

confidence: 99%

“…The voltammetric response from that pesticide in this buffer consists of three signals, peak I at about −1.4 V and peaks II and III at −0.6 and −0.85 V, respectively. The latter two resulted from a two-step irreversible reduction of nitro group into amine group; their analytical applicability was elaborated in our previous studies (Guziejewski et al 2011). We believe that the peak I is attributed to catalytic hydrogen evolution induced by the presence of a guanidine group in the CLT structure as a result of a decreased hydrogen overvoltage.…”

Section: Selection Of Experimental and Instrumental Conditionsmentioning

confidence: 99%

“…In our previous work, we reported on the determination of CLT with square-wave voltammetry (SWV) on a hanging mercury drop electrode (HMDE; Guziejewski et al 2011). This analysis was based on the reduction of the nitro group present in the pesticide structure.…”

Section: Introductionmentioning

confidence: 99%

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Application of Catalytic Hydrogen Evolution in the Presence of Neonicotinoid Insecticide Clothianidin

2011

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Clothianidin, a new generation of pesticide, was determined in spiked tap water, apple juice, and soil by square-wave adsorptive stripping voltammetry. The method of determination is based on the hydrogen evolution reaction catalyzed by clothianidin at the hanging mercury drop electrode. The optimal signal was detected at −1.4 V versus Ag/AgCl in citrate buffer at pH 2.2. Various parameters such as pH, buffer concentration, frequency, amplitude, step potential, accumulation time, and potential were investigated to enhance the sensitivity of the determination. The optimal results were recorded at an accumulation potential of −0.35 V, accumulation time of 7 s, amplitude of 100 mV, frequency of 200 Hz, and step potential of 7 mV. The mechanism of catalytic hydrogen evolution was considered under experimental and theoretical conditions. This electroanalytical procedure enabled to determine clothianidin in the concentration range 9×10 −9 -4×10 −6 mol L −1 in supporting electrolyte and tap water, 1×10 −7 -4×10 −6 mol L −1 in diluted apple juice, and 2× 10 −7 -1×10 −6 mol L −1 in soil. The detection and quantification limits in supporting electrolyte and diluted apple juice were found to be 2.6×10 −9 , 8.6×10 −9 and 3×10 −8 , and 1×10 −7 mol L −1 , respectively. A standard addition method was successfully used to determine clothianidin in spiked tap water, spiked apple juice, and spiked soil.

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Section: Discussionmentioning

confidence: 99%

Section: Selection Of Experimental and Instrumental Conditionsmentioning

confidence: 99%

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Application of Catalytic Hydrogen Evolution in the Presence of Neonicotinoid Insecticide Clothianidin

2011

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“…Investigation of nitro-group containing compounds using voltammetric methods has been utilized since the very beginning of polarography [20] and voltammetry [21]. Despite the increased fears of liquid mercury toxicity in the past years, a stable attention is given to the development of electroanalytical methods that utilize hanging mercury drop [22] or amalgam electrodes [23][24][25]. The most common electrode reaction involves twostep mechanism corresponding initially to a four-electron reduction of the NO 2 group and the second signal with the reduction of the previously formed hydroxylamine group to the NH 2 group involving two electrons [26].…”

Section: Introductionmentioning

confidence: 99%

First Electrochemical Method of Nitrothal-Isopropyl Determination in Water Samples

Guziejewski

Nosal‐Wiercińska

Skrzypek

et al. 2016

Journal of Chemistry

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The aim of the research was the use of square wave adsorptive stripping voltammetry (SWAdSV) in conjunction with a hanging mercury drop electrode (HMDE) for the determination of nitrothal-isopropyl. It was found that optimal SW technique parameters were frequency, 200 Hz; amplitude, 50 mV; and step potential, 5 mV. Accumulation time and potential were studied to select the optimal conditions in adsorptive stripping voltammetry: 45 s at 0.0 V, respectively. The calibration curve (SWSV) was linear in the nitrothal-isopropyl concentration range from 2.0 × 10−7 to 2.0 × 10−6 mol L−1 with detection limit of 3.46 × 10−8 mol L−1. The repeatability of the method was determined at a nitrothal-isopropyl concentration level equal to 6.0 × 10−7 mol L−1 and expressed as RSD = 5.5% (n=6). The proposed method was successfully validated by studying the recovery of nitrothal-isopropyl in spiked environmental samples.

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“…The techniques are often successfully applied for analytical determinations of drugs 11,12 and pesticides [13][14][15][16] .…”

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confidence: 99%

Voltammetric study of 2-guanidinobenzimidazole: Electrode mechanism and determination at mercury electrode

Skrzypek

Mirčeski

Smarzewska

et al. 2011

Collect. Czech. Chem. Commun.

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Although 2-guanidinobenzimidazole (GBI; CAS: 5418-95-1) is a compound of biological interest, generally there is a lack of electrochemical studies and the methods of its determination. The GBI behavior at a mercury electrode was analyzed under conditions of linear sweep voltammetry (LSV), differential pulse voltammetry (DPV), square-wave voltammetry (SWV) and square-wave stripping voltammetry (SWSV). Although GBI is electrochemically inactive at mercury electrode it adsorbs at the mercury surface and catalyzes effectively the hydrogen evolution reaction. Theoretical analysis of two possible pathways, according to which the GBI electrode mechanism can be explained, is performed. Simple analysis of peak current and potential with respect to available time window, i.e. change of frequency can be helpful in discerning the character of the recorded SW current. The established electrode mechanism is assumed to involve a preceding chemical reaction in which the adsorbed catalyst (GBI ads ) is protonated and the protonated form of the catalyst (GBIH + (ads) ) is irreversibly reduced at potential about -1.18 V vs Ag|AgCl (citrate buffer pH 2.5). New methods of voltammetric determination of 2-guanidinobenzimidazole were developed. The detection and quantifications limits were found to be 1 × 10 -7 , 1 × 10 -6 mol l -1 (SWV); 8 × 10 -8 , 9 × 10 -7 mol l -1 (SWSV); 4 × 10 -7 , 2 × 10 -6 mol l -1 (DPV) and 6 × 10 -7 , 3 × 10 -6 mol l -1 (LSV), respectively.

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Cathodic stripping voltammetry of clothianidin: Application to environmental studies

Cited by 20 publications

References 24 publications

Application of Catalytic Hydrogen Evolution in the Presence of Neonicotinoid Insecticide Clothianidin

Application of Catalytic Hydrogen Evolution in the Presence of Neonicotinoid Insecticide Clothianidin

First Electrochemical Method of Nitrothal-Isopropyl Determination in Water Samples

Voltammetric study of 2-guanidinobenzimidazole: Electrode mechanism and determination at mercury electrode

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