Ultra-trace determination of silver using lead nanoparticles-modified thiol functionalized polysiloxane film glassy carbon electrode

Sadok, Ilona; Tyszczuk‐Rotko, Katarzyna

doi:10.1016/j.jelechem.2017.12.010

Cited by 8 publications

(15 citation statements)

References 18 publications

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“…However, due to the lack of literature addressing this problem, it is difficult to establish a proper comparison. The results of the validation were in agreement with what has been published for methods determining silver in other systems (other working electrodes or modified electrodes) . In this work, Ag + was properly identified and the achievement of a single signal was possible.…”

Section: Discussionsupporting

confidence: 88%

“…Due to its low toxicity and relatively low cost, carbon has always been an attractive material for electrodes in electroanalysis. Silver has been detected with a wide range of carbon electrodes but only a limited number of articles have been published on the use of glassy carbon electrodes, most of them chemically modified . Numerous articles discuss the determination of silver by electrochemical techniques .…”

Section: Introductionmentioning

confidence: 99%

“…Silver has been detected with a wide range of carbon electrodes but only a limited number of articles have been published on the use of glassy carbon electrodes, most of them chemically modified . Numerous articles discuss the determination of silver by electrochemical techniques . However, none addresses the direct detection and quantification of ionic silver (Ag + ) in presence of silver nanoparticles (AgNP) using glassy carbon electrodes and its application in real samples containing colloidal and ionic silver.…”

Section: Introductionmentioning

confidence: 99%

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Detection and Determination of Released Ions in the Presence of Nanoparticles: Selectivity or Strategy?

et al. 2019

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Metallic nanoparticles can release ionic species, but also both species can occur in the same samples. Therefore, there is a need of efficient and cost‐effective methods to determine these ionic species in the presence of the corresponding nanoparticles. Electroanalytical techniques open the door to this selective detection of NPs and their ions. In this work, a methodology that allows the direct determination of ionic silver (Ag+) in the presence of silver nanoparticles based on anodic stripping voltammetry was implemented. Silver nanoparticles were determined, after acidic digestion of the sample, by difference with respect to the total content of silver. The method was validated in terms of specific identification of silver ions, linearity, working range, limit of detection, limit of quantification, recovery, repeatability and ruggedness. All parameters are adequate for an analytical method following Eurachem recommendations. The validated method was used to determine the concentration of Ag+ and total silver in two commercial products of colloidal silver. The results were compared with those obtained by atomic absorption spectrometry in combination with an ultrafiltration step for isolation of ionic silver. There were no significant differences in the results. The proposed methodology benefits from the intrinsic selectivity of the electroanalysis methods, allowing to eliminate the steps of pretreatments of the samples, which are necessary in other techniques. The novelty of the article lies in the direct determination of Ag (I) ions in the presence of AgNPs, without the use of previous separation steps.

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Section: Discussionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Detection and Determination of Released Ions in the Presence of Nanoparticles: Selectivity or Strategy?

et al. 2019

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“…NMs have been primarily applied on the electrodes in combination with other modifiers (including through the formation of composites). [22][23][24][25]27,[30][31][32]34,46,47,50,54,59,67,70,72,75,83,85,86,88,89,[92][93][94][95][96][97][98][99][100][101][102]107,113,115,117,118,[122][123][124][125][126][129][130][131]135,136,[138][139]...…”

Section: Nanomaterials As Electrode Modifiersmentioning

confidence: 99%

Recent advances in the modification of electrodes for trace metal analysis: a review

Xhanari,

Finšgar

2023

Analyst

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“…The latter's use is restricted due to high mercury toxicity concerns (Lu et al, 2018). In the last years the focus of the research community has been on the modification of the GCE using among others nanomaterials, organic molecules and biomolecules (Bansod et al, 2017;Cui et al, 2015;Lee et al, 2016;Zinoubi et al, 2017;Dahaghin et al, 2018;Sadok and Tyszczuk-Rotko, 2018;Lee et al, 2015;Ariño et al, 2017). Film electrodes, in situ or ex situ prepared with mainly bismuth, but also of copper, lead and tin, have been also explored (Ariño et al, 2017;Jovanovski et al, 2015Jovanovski et al, , 2017Economou, 2005;Petovar et al, 2018;Czop, 2011;Korolczuk et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

In-situ Modified Antimony-Film Glassy Carbon Electrode for Metal Trace Analysis

Xhanari¹,

Ramot²,

Petovar³

et al. 2018

The International Conference on Advanced Materials and Systems

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Glassy carbon electrodes (GCE) have been extensively employed for the determination of trace amounts of heavy metals. Lately, modifications of GCE are currently being sought. One way of obtaining better analytical performance compared to GCE is the employment of an in situ prepared antimony-film glassy carbon electrode (SbFE). This combination is especially attractive in anodic stripping voltammetry technique which uses square wave excitation signal. This work will report on the optimization of the in situ prepared SbFE by employing different deposition potentials. Furthermore, a preliminary study using electrochemical impedance spectroscopy (EIS) was performed at different deposition and measured potentials in order to understand the mechanism of SbFE sensor performance.

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Ultra-trace determination of silver using lead nanoparticles-modified thiol functionalized polysiloxane film glassy carbon electrode

Cited by 8 publications

References 18 publications

Detection and Determination of Released Ions in the Presence of Nanoparticles: Selectivity or Strategy?

Detection and Determination of Released Ions in the Presence of Nanoparticles: Selectivity or Strategy?

Recent advances in the modification of electrodes for trace metal analysis: a review

In-situ Modified Antimony-Film Glassy Carbon Electrode for Metal Trace Analysis

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