Conditioning of renewable silver amalgam film electrode for the characterization of clothianidin and its determination in selected samples by adsorptive square-wave voltammetry

Brycht, Mariola; Skrzypek, Sławomira; Guzsvány, Valéria; Berenji, Janoš

doi:10.1016/j.talanta.2013.08.048

Cited by 42 publications

(21 citation statements)

References 52 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%

“…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]. 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].…”

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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“…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. The signals recorded using amalgam film electrodes originated from the reduction of the nitro [74][75][76][77][78], keto [79], azo [80], chinone [81], pyrimidine [72], pteridine [72], adenine [82] groups or hydrogen evolution catalyzed by organic compounds adsorbed at the surface of the electrode [73,[83][84][85][86]. Although the reduction of the above-listed organic compounds occurs in more than one step, in most cases only one peak was considered useful for analytical purposes.…”

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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“…Although a mercury electrode is clearly the best choice for electroanalytical determination of aclonifen, there is a tendency to replace liquid mercury electrodes with other non-toxic materials, e.g., bismuth or solid amalgam electrodes, due to strict safety and ecological rules. An example of such an electrode is a renewable silver amalgam film electrode (Hg(Ag)FE), [17][18][19][20] which properties, such as a wide potential window, easily mechanically renewable surface, and low noise, make it a very promising electroanalytical tool. Liquid amalgam, with a volume not exceeding 10 μL, enables stable electrode functioning for several months.…”

Section: Introductionmentioning

confidence: 99%

Rapid and Sensitive Voltammetric Determination of Aclonifen in Water Samples

Guziejewski

Smarzewska

Skowron

et al. 2016

ACSi

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This paper presents the use of square wave voltammetry (SWV) and square wave adsorptive stripping voltammetry (SWAdSV) in conjunction with a cyclic renewable silver amalgam film electrode (Hg(Ag)FE) for the determination of aclonifen in spiked water samples. A reduction peak at -0.65 V versus Ag/AgCl was obtained in the selected buffer (borax buffer with pH 9.2), exhibiting the characteristics of an irreversible reaction. The effect of square wave (SW) frequency, SW amplitude and step potential, as well as accumulation parameters (time and potential) were studied to select the optimal experimental conditions. The calibration curve was linear in the aclonifen concentration range from 1.0 × 10 -7 to 1.0 × 10 -6 mol L -1 and from 1.0 × 10 -8 to 1.0 × 10 -7 mol L -1 for SWV and SWAdSV, respectively. The detection and quantification limits were found to be 3.1 × 10 -8 mol L -1 ; 1.0 × 10 -7 mol L -1 and 2.9 × 10 -9 mol L -1 ; 9.6 × 10 -9 mol L -1 for SWV and SWAdSV, respectively. The proposed method was applied successfully in the determination of aclonifen in spiked water samples. The developed procedure can be adequate at least for screening purposes, where positive results should be confirmed by more selective method.

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Conditioning of renewable silver amalgam film electrode for the characterization of clothianidin and its determination in selected samples by adsorptive square-wave voltammetry

Cited by 42 publications

References 52 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

Rapid and Sensitive Voltammetric Determination of Aclonifen in Water Samples

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