The new application of renewable silver amalgam film electrode for the electrochemical reduction of nitrile, cyazofamid, and its voltammetric determination in the real samples and in a commercial formulation

Brycht, Mariola; Skrzypek, Sławomira; Nosal‐Wiercińska, Agnieszka; Smarzewska, Sylwia; Guziejewski, Dariusz; Ciesielski, Witold; Burnat, Barbara; Leniart, Andrzej

doi:10.1016/j.electacta.2014.04.143

Cited by 30 publications

(26 citation statements)

References 31 publications

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“…In the case of amalgam film electrodes, the electroanalytical response of substances listed in Table 2 was significantly affected by the pH of the solution. In the case of the fungicide cyazofamid [40], a small variation in the pH from 2.4 to 2.6 caused a 50 % increase in peak current. As can be seen in Table 2, in order to obtain satisfying results it is necessary to control the pH of the supporting electrolyte with very high precision.…”

Section: Organic Analysismentioning

confidence: 98%

“…However, nitenpyrame contains the nitro group and its reduction occurs in two steps, with an initial reduction to hydroxylamine and the second one to amine; after careful optimization of chemical variables, it was possible to obtain two welldeveloped reduction signals [74]. Using Ag(Hg)FE-c, it is also possible to record reduction signals originating from electrochemical reduction of the cyano group [40,87,88]. The electrochemistry of cyano organic compounds at mercury electrodes is not fully explained.…”

Section: Organic Analysismentioning

confidence: 99%

“…Moreover, the Hg(Ag)FE has been used in some studies of electrode [e.g., [39][40][41] and adsorption processes [41,42]. Examples of the application of the discussed sensors in voltammetric and chronopotentiometric stripping analysis are presented in Tables 1 and 2.…”

Section: Application In Stripping Electroanalysismentioning

confidence: 99%

“…On the contrary, the reduction of nitrile at solid metallic electrodes, including silver, is well-documented. Taking into account the fact that amalgam electrodes comprise both mercury and silver, it was possible to record signals of substances that are not reducible using pure mercury, for example nitrile fungicides: cyazofamid [40], fludioxonil [84], and fenoxanil [85].…”

Section: Organic Analysismentioning

confidence: 99%

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Renewable silver amalgam film electrodes in electrochemical stripping analysis—a review

Bobrowski

Królicka

Bobrowski³

2016

J Solid State Electrochem

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The success of a voltammetric sensing procedure depends mainly on the proper choice of the working electrode. This is because its ability to accumulate the analyte determines the sensitivity of the method. The main criterion of the selection of the proper working electrode is the available potential window. A variety of conductive materials have been used for the preparation of working electrodes. Of these, two kinds of mercury electrodes-hanging mercury drop and film-were used because of their excellent voltammetric performance and, in particular, their high overpotential of hydrogen reduction. The significant drawbacks of mercury electrodes, however, are the toxicity of the material and the instability of liquid mercury films. To overcome these disadvantages, less toxic mercury-containing materials have been used, such as amalgams and amalgam film electrodes. This group includes renewable silver amalgam film electrodes used for electrochemical stripping sensing purposes. These electrodes have successfully been applied for anodic, adsorptive, cathodic, catalytic voltammetric, and potentiometric stripping determination of trace amounts of inorganic cations and organic compounds in various natural matrices. In this review, the electrode design, characteristics, and application of two kinds of renewable silver amalgam film electrodes are discussed in detail.

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Section: Organic Analysismentioning

confidence: 98%

Section: Organic Analysismentioning

confidence: 99%

Section: Application In Stripping Electroanalysismentioning

confidence: 99%

Section: Organic Analysismentioning

confidence: 99%

See 2 more Smart Citations

Renewable silver amalgam film electrodes in electrochemical stripping analysis—a review

Bobrowski

Królicka

Bobrowski³

2016

J Solid State Electrochem

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“…More direct approach using silver amalgam based electrodes is also a recurring theme in the contemporary literature [18][19][20][21][22], all the works use a mercury film modified AgSAE for some reason, which uses small amounts of mercury for film renewal, but the mercury has to be in a toxic water soluble form, the film is much less stable than a meniscus and the electrode needs to be polished much more often, which is time consuming. Some works focus on the determination of herbicides at classical mercury electrodes [23] this method utilizes the excellent reproducibility of a hanging mercury drop electrode (HMDE) to deconvolute the signals of three herbicides to determine them in a mixture.…”

Section: Introductionmentioning

confidence: 99%

Voltammetric Determination of Aclonifen at a Silver Amalgam Electrode in Drinking and River Water

Novotný

Barek

2017

Ecological Chemistry and Engineering S

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Abstract:A method for the determination of pesticide Aclonifen (AC) in drinking and river water by differential pulse voltammetry (DPV) on a meniscus modified silver solid amalgam electrode (m-AgSAE) using solid phase extraction (SPE) as a cleanup and preconcentration procedure is described. The limit of detection (LOD) for direct DPV determination of AC in deionized water is 2.7·10 -8 mol·dm -3. LOD for DPV determination of AC in tap water after SPE is 1.6·10 -10 mol·dm -3, the recovery being 55%. LOD for the determination of AC in Vltava river water is 1.9·10 -9 mol·dm -3, the recovery being 65%. Humic acids interfere with the determination in river water; this problem can be resolved by adjusting the pH of the extracted sample to 6. The advantages of this approach are high sensitivity, low LOD, quick and easy sample preparation and fast determination.

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A Novel Method of High Sensitive Determination of Prednisolone on Renewable Mercury Film Silver Based Electrode

2015

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[a] 1IntroductionGlucocorticoids are group of important medications with wide variety of use,m ainly due to their anti-inflammatory and immunosuppressive properties.H uman body produces natural corticoids which are necessaryf or propers ecretion of other hormones and keeping homeostasis. However, affecting the balance of adrenalh ormones excretion may cause diseases connected with necessity of using their synthetic analogs in very little and controlled doses.T aking drugs containingc orticoids is connected with the risk of serious adversee ffects,t hus quality control of medications consisting this group of active substances shouldb ev ery precise [1,2].Prednisolone ((11b)-11,17,21-trihydroxypregna-1,4-diene-3,20-dione [8].P rednisolone derivative is also used in ophthalmologya sacontent of eye drops used to reducea llergic reactionsa ffecting eyes, such as swellinga nd itching [ 9,10].D ue to its immunosuppressive properties is also widely use after organ transplantation [11] and as ah ormone substitution for patients unable to produce proper amounts of corticosteroids on its own [12].L ong term usage of this corticoid may cause serious side effectsl ike gaining weight, high blood pressure,m usclew eakness,o steoporosis,h igh glucose level in body fluids or mentalh ealth problems [13][14][15][16].Numerous studies have been presented withd ifferent prednisolone determination methods including spectroscopy [17],s pectrophotometry [18,19],g as chromatography [20][21][22],c hemiluminescence [23] and high performance liquid chromatography (HPLC) coupled with various detector [24][25][26][27].H owever these methods generate lots of chemical wastesa nd also require time consuming sample preparation connected with risk of its contamination.S uch inconveniences can be eliminated using electrochemical methods,w hich provide high sensitivity,l ow limit detectiona nd simple procedure of sample preparation.C lassical polarography [28,29] and different voltammetry techniques were used for prednisolone determination.R ecently,t wo voltammetric methodsw ere developed for the analyte determinationi nd rug samples based on oxidation of prednisolone at glassy carbon electrode [30] . One of the methodso fa chieving high sensitivity in voltammetry is development in the working electrode constructionf ield. Va rious typeso fm etal film electrodes were constructed recently.A mongt hem lead, gallium and mercury were most frequently used [35][36][37].I nteresting solution of renewable mercury film electrode was proposed by Baś and Kowalski[ 38].W ith the renewable Abstract:F ast and sensitive method of prednisoloned eterminationa tr enewable mercury film electrodeu sing differentialp ulse adsorptive stripping voltammetry (DPAdSV) was successfully developed. Thee ffects of various factors such as:p reconcentration potential and time, pulse height, step potential and supporting electrolyte composition were optimized.Alinear voltammetric response for analyte was obtained in the concentration), with ad etectionl imit of 0.01 mmolL À1 ...

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The new application of renewable silver amalgam film electrode for the electrochemical reduction of nitrile, cyazofamid, and its voltammetric determination in the real samples and in a commercial formulation

Cited by 30 publications

References 31 publications

Renewable silver amalgam film electrodes in electrochemical stripping analysis—a review

Renewable silver amalgam film electrodes in electrochemical stripping analysis—a review

Voltammetric Determination of Aclonifen at a Silver Amalgam Electrode in Drinking and River Water

A Novel Method of High Sensitive Determination of Prednisolone on Renewable Mercury Film Silver Based Electrode

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