Copper-film electrodes for Pb(II) trace analysis and a detailed electrochemical impedance spectroscopy study

Finšgar, Matjaž; Xhanari, Klodian; Petovar, Barbara

doi:10.1016/j.microc.2019.04.007

Cited by 16 publications

(7 citation statements)

References 43 publications

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“…197,248 Trace heavy metal analysis has been performed either with just BiFEs 247,248,252,253,[255][256][257]260 or with electrodes modified with a Bi-film combined with other materials and/or compounds, including with different NMs, 25,50,83,181,256 Nafion and GO, 40,83,233,235,250 as well as doping of the Bi-films with boron or indium. 245,259 Various other metals, including Sb, [261][262][263][264] Cu, [265][266][267] Au, 268 Pb, 269 and Hg, 260 have also been electrodeposited on different types of electrodes. Moreover, complexing agents such as 8-hydroxyquinoline, 251 nioxime, 265 and cupferron 269 have been added during the in situ Bi-, Pb-, and Cu-film modification of GCEs.…”

Section: Film-forming Substances 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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Section: Film-forming Substances As Electrode Modifiersmentioning

confidence: 99%

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

Xhanari,

Finšgar

2023

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“…Bismuth-film electrodes can be prepared in situ and ex situ, and both give good electroanalytical performances in heavy metal determination [7,8,20,[24][25][26][27][28]. The modification of the working electrode can be essential to ensure the desired analytical performance [8,[29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44].…”

Section: Introductionmentioning

confidence: 99%

Pb(II) Determination in a Single Drop Using a Modified Screen-Printed Electrode

2021

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This work presents the development and validation of an electroanalytical method for Pb(II) determination in a single drop. The electrochemical sensors used were an unmodified screen-printed electrode (SPE) and a Bi-film SPE (BiFSPE). Anodic square wave stripping voltammetry (SWASV) was performed at an accumulation potential of −1.5 V vs. Ag/AgCl and an accumulation time of 60 s. Electroanalysis with an unmodified SPE did not yield satisfactory results, whereas the BiFSPE was a much better analysis method. The linear concentration using the BiFSPE was in the range of 138.8–162.5 µg/L. The accuracy and precision were evaluated for different spiked concentrations, but the method using the unmodified SPE was neither accurate nor precise. Using the BiFSPE, the method was found to be both accurate and precise for Pb(II) determination at a concentration of 140.0 μg/L, with recovery and relative standard deviation (RSD) of 106.6% and 12.1%, respectively. In addition, using the BiFSPE, LOD and LOQ values of 1.2 μg/L and 3.3 μg/L were obtained, respectively. The possible interference effect on Pb(II) stripping signal was checked in the presence of Cd(II), Zn(II), Cu(II), Sn(IV), Sb(III), Hg(II), Fe(III), As(V), K(I), I−, Ca(II), and NO3−. Electrochemical impedance spectroscopy measurements were also performed for the unmodified SPE and BiFSPE. The application of single drop Pb(II) analysis was tested by real water sample analysis.

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“…This film electrode exhibited excellent performance in the presence of dissolved oxygen with LOD of 0.1 μg L À 1 for Hg(II) and that of 0.06 μg L À 1 for Pb(II). Finšgar et al investigated the kinetics of the electroanalytical behavior for the accumulation of Pb at a copper-film electrode using electrochemical impedance spectroscopy [34], where the LOD for the copper-film electrode was significantly lower than that for a bare glassy carbon electrode.…”

Section: Introductionmentioning

confidence: 99%

“…Finšgar et al. investigated the kinetics of the electroanalytical behavior for the accumulation of Pb at a copper‐film electrode using electrochemical impedance spectroscopy [34], where the LOD for the copper‐film electrode was significantly lower than that for a bare glassy carbon electrode.…”

Section: Introductionmentioning

confidence: 99%

Coulometric Anodic Stripping Voltammetry of Lead at Copper Column Electrode

et al. 2021

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A flow coulometric electroanalytical system using a copper column electrode with a copper wire inserted into a Nafion tube was developed to determine Pb(II) content based on anodic stripping voltammetry. The electrolysis efficiency of 5 μM Pb(II) was evaluated to be 100.4±4.5 % (n=5) when the length of the copper wire and flow rate of the Pb(II) solution were 50 cm and 0.1 mL min−1, respectively. The amount of electricity due to the re‐oxidation of Pb electrodeposited at the copper column electrode was proportional to the concentration of Pb(II) in the range between 0.1 to 100 μM, and the limit of detection for Pb(II) was 0.8 μM for a deposition time of 15 min. Interference from the presence of Cd(II) could be avoided and the selective determination of Pb(II) was successfully achieved by adjustment of the electrodeposition potential.

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Copper-film electrodes for Pb(II) trace analysis and a detailed electrochemical impedance spectroscopy study

Cited by 16 publications

References 43 publications

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

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

Pb(II) Determination in a Single Drop Using a Modified Screen-Printed Electrode

Coulometric Anodic Stripping Voltammetry of Lead at Copper Column Electrode

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