Ultra trace level determination of fenoxanil by highly sensitive square wave adsorptive stripping voltammetry in real samples with a renewable silver amalgam film electrode

Brycht, Mariola; Skrzypek, Sławomira; Robak, J.; Vajdle, Olga; Zbiljić, Jasmina; Nosal‐Wiercińska, Agnieszka; Guziejewski, Dariusz; Andrijewski, Grzegorz

doi:10.1016/j.jelechem.2014.11.029

Cited by 28 publications

(19 citation statements)

References 45 publications

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“…Recently, a renewable silver-amalgam film electrode (Hg(Ag)FE) was applied to study the reduction of EES, the analytical signal of which appeared in a fairly negative potential range, and a trace-level adsorptive stripping voltammetric method was used to determine its concentration in a selected pharmaceutical preparation and in a spiked urine sample [35]. It is well-known that the Hg(Ag)FE is a relatively new type of amalgam-based electrodes [36][37][38][39], and provides an alternative to the hanging mercury drop electrode due to their similar electrochemical characteristics [40]; the Hg(Ag)FE enables the determination of a wide range of analytes, including different organic compounds [35,[41][42][43][44][45][46][47][48][49][50][51][52][53][54]. For example, it was used for the determination of the levels of some medications, such as EES [35], doxorubicin [41], closantel [42], moroxydine [43], ambazone [44], proguanil [45], prednisolone [46] in spiked urine samples [35,41,[43][44][45] and in pharmaceutical preparation [35,42,[44][45][46].…”

Section: Loq Was 2á10mentioning

confidence: 99%

“…The Hg(Ag)FE was also successfully applied for the quantitation of some neonicotinoid insecticides [47][48][49][50][51] in various matrices, such as spiked river water [48][49][50], commercial formulations [48,49], corn seed [50], spiked honey [48] and carrot juice [51]. Furthermore, the herbicide aclonifen was determined in spiked water samples and the fungicide fenoxanil in spiked river water and spiked rice samples [52,53]. The ability to easily and quickly refresh the electrode surface before each measurement allows the Hg(Ag)FE to be applied in adsorptive stripping measurements [39], as in the case of EES [35], doxorubicin [41], closantel [42] and chlornitrofen [54].…”

Section: Loq Was 2á10mentioning

confidence: 99%

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Voltammetric behavior and determination of the macrolide antibiotics azithromycin, clarithromycin and roxithromycin at a renewable silver – amalgam film electrode

Vajdle

Guzsvány

Škorić

et al. 2017

Electrochimica Acta

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The renewable silver-amalgam film electrode (Hg(Ag)FE) was applied for voltammetric characterization and determination of semi-synthetic macrolide antibiotics azithromycin (AZI), clarithromycin (CLA) and roxithromycin (ROX) in the Britton-Robinson buffer as supporting electrolyte ranging the pH from 4.0 to 11.9. All three macrolides showed reduction signals in fairly negative potential range.During direct cathodic square wave voltammetric (SWV) investigations conducted over the potential range from À0.75 V to À2.00 V vs SCE, either one or two reduction peaks were obtained in the potential range from À1.5 to À1.9 V. The shapes and intensities of the signals depend on the applied pH values in wider pH ranges. For analytical purposes concerning the development of direct cathodic SWV and adsorptive stripping SWV (SW-AdSV) methods the neutral and slightly alkaline media were suitable as pH 7.2, pH 7.4 and pH 7.0 for AZI, CLA and ROX, respectively. Based on the cyclic voltammograms recorded at these pH values, adsorption-controlled electrode kinetics process can be proposed for all three macrolides. Furthermore, the water suppressed 1 H NMR measurements in the pH range between 6.0 and 10.5 indicated that the macrolide molecules at the optimal analytical conditions are predominantly in protonated form via their tertiary amino groups which supported in all three cases their adsorption on the appropriately polarized Hg(Ag)FE electrode. The optimized direct cathodic SWV methods showed good linearity in concentration ranges 4.81-23.3 mg mL À1 , 1.96-28.6 mg mL À1 and 1.48-25.9 mg mL À1 for AZI, CLA and ROX, respectively. The development of the SW-AdSV methods resulted in the linear responses at lower concentration ranges as 1.0-2.46 mg mL À1, 0.05-0.99 mg mL À1 and 0.10-0.99 mg mL À1 , for AZI, CLA and ROX, respectively. The relative standard deviation for all developed methods was not higher than 1.0% except the SWV method for AZI with 4.7%. In the case of all three investigated macrolide antibiotics the protonated form of the tertiary amino group(s) at appropriate accumulation potential and time favored the adsorption of the ionic form of the target molecules offering the opportunity for the development of SW-AdSV methods for their trace level analysis on Hg(Ag)FE. Optimized SW-AdSV method was applied for determination of ROX in pharmaceutical preparation Runac

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Section: Loq Was 2á10mentioning

confidence: 99%

Section: Loq Was 2á10mentioning

confidence: 99%

Voltammetric behavior and determination of the macrolide antibiotics azithromycin, clarithromycin and roxithromycin at a renewable silver – amalgam film electrode

Vajdle

Guzsvány

Škorić

et al. 2017

Electrochimica Acta

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“…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%

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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“…The Hg(Ag)FE surface required special pretreatment before use [26,27,33,34]. Chemical treatment in 2% HNO 3 for about 5 minutes was applied to clean the Hg(Ag)FE surface.…”

Section: Voltammetric Proceduresmentioning

confidence: 99%

“…A relatively novel type of electrode, the silver amalgam film electrode (Hg(Ag)FE) constructed by scientists from AGH University of Science and Technology, Cracow, Poland, represents an appropriate alternative to the mercury electrodes. Hg(Ag)FE has been successfully used for the determination of several metals [12][13][14][15][16][17][18], some popular vitamins (C1, B1 and B2) [19], and a number of organic compounds [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Voltammetric and corrosion studies of the fungicide fludioxonil

Brycht

Burnat

Skrzypek

et al. 2015

Electrochimica Acta

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Ultra trace level determination of fenoxanil by highly sensitive square wave adsorptive stripping voltammetry in real samples with a renewable silver amalgam film electrode

Cited by 28 publications

References 45 publications

Voltammetric behavior and determination of the macrolide antibiotics azithromycin, clarithromycin and roxithromycin at a renewable silver – amalgam film electrode

Voltammetric behavior and determination of the macrolide antibiotics azithromycin, clarithromycin and roxithromycin at a renewable silver – amalgam film electrode

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

Voltammetric and corrosion studies of the fungicide fludioxonil

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