Insights into the anodic stripping voltammetric behaviour of copper film electrodes for determination of trace mercury

Jovanovski, Vasko; Hrastnik, Nana I.

doi:10.1016/j.microc.2019.02.027

Cited by 17 publications

(18 citation statements)

References 18 publications

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“…The procedure was first developed and optimized for the CuF/GCE working electrode and then successful measurements were carried out using the obtained parameters with the novel modified CuF/CN/SPE electrode. As already mentioned, in the literature, we do not find too many works relating to the use of the copper film electrode [ 1 , 2 , 3 , 4 ]. Copper film modified electrodes seem to be an excellent proposal for the determination of trace amounts of metals also in real samples.…”

Section: Introductionmentioning

confidence: 95%

“…Film metal modified electrodes have become more and more popular in recent years, especially as a replacement for toxic mercury electrodes. These electrodes can be generated on various substrates, but the most common is glassy carbon [ 1 , 2 , 4 , 11 , 12 , 13 , 14 ]. In recent years, more attention has been paid to screen-printed electrodes, which can be used either as direct working electrodes or as an attractive substrate for the generation of film metal electrodes.…”

Section: Introductionmentioning

confidence: 99%

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Copper Film Modified Glassy Carbon Electrode and Copper Film with Carbon Nanotubes Modified Screen-Printed Electrode for the Cd(II) Determination

Wasąg

Grabarczyk

2021

Materials

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A copper film modified glassy carbon electrode (CuF/GCE) and a novel copper film with carbon nanotubes modified screen-printed electrode (CuF/CN/SPE) for anodic stripping voltammetric measurement of ultratrace levels of Cd(II) are presented. During the development of the research procedure, several main parameters were investigated and optimized. The optimal electroanalytical performance of the working electrodes was achieved in electrolyte 0.1 M HCl and 2 × 10−4 M Cu(II). The copper film modified glassy carbon electrode exhibited operation in the presence of dissolved oxygen with a calculated limit of detection of 1.7 × 10−10 M and 210 s accumulation time, repeatability with RSD of 4.2% (n = 5). In the case of copper film with carbon nanotubes modified screen-printed electrode limit of detection amounted 1.3 × 10−10 M for accumulation time of 210 s and with RSD of 4.5% (n = 5). The calibration curve has a linear range in the tested concentration of 5 × 10−10–5 × 10−7 M (r = 0.999) for CuF/GCE and 3 × 10−10–3 × 10−7 M (r = 0.999) for CuF/CN/SPE with 210 s accumulation time in both cases. The used electrodes enable trace determination of cadmium in different environmental water samples containing organic matrix. The validation of the proposed procedures was carried out through analysis certified reference materials: TM-25.5, SPS-SW1, and SPS-WW1.

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Copper Film Modified Glassy Carbon Electrode and Copper Film with Carbon Nanotubes Modified Screen-Printed Electrode for the Cd(II) Determination

Wasąg

Grabarczyk

2021

Materials

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“…On the other hand, the OC combined value for 1.94Bi was determined to be 0.009410. BiFE is considered to be one of the benchmarks regarding in situ FEs in the electroanalysis of heavy metal traces [1,8,12,[41][42][43][44][45][46][47]. Therefore, the importance of this work is signified with the OC combined value for 1.00Bi0.60Sn0.34Sb, which is at least one order of magnitude better (higher), thus demonstrating the improved design of the in situ FE when using this combination of ions to form an in situ FE compared to the use of only one ion to form a pure in situ FE.…”

Section: Interference Studymentioning

confidence: 99%

The Use of Factorial Design and Simplex Optimization to Improve Analytical Performance of In Situ Film Electrodes

Finšgar

Jezernik

2020

Sensors

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This work presents a systematic approach to determining the significance of the individual factors affecting the analytical performance of in-situ film electrode (FE) for the determination of Zn(II), Cd(II), and Pb(II). Analytical parameters were considered simultaneously, where the lowest limit of quantification, the widest linear concentration range, and the highest sensitivity, accuracy, and precision of the method evidenced a better analytical method. Significance was evaluated by means of a fractional factorial (experimental) design using five factors, i.e., the mass concentrations of Bi(III), Sn(II), and Sb(III), to design the in situ FE, the accumulation potential, and the accumulation time. Next, a simplex optimization procedure was employed to determine the optimum conditions for these factors. Such optimization of the in situ FE showed significant improvement in analytical performance compared to the in situ FEs in the initial experiments and compared to pure in situ FEs (bismuth-film, tin-film, and antimony-film electrodes). Moreover, using the optimized in situ FE electrode, a possible interference effect was checked for different species and the applicability of the electrode was demonstrated for a real tap water sample.

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“…Anodic stripping voltammetry (ASV) is an electroanalytical technique that can provide high sensitivity for trace metal analyses in a variety of environmental matrices [ 13 ]. Its exceptional sensitivity is attributed to the preconcentration step, wherein the metal accumulates onto the surface of the electrode by applying a sufficient negative potential through which the target analyte is reduced to form an amalgam with the electrode [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Bismuth Film-Coated Gold Ultramicroelectrode Array for Simultaneous Quantification of Pb(II) and Cd(II) by Square Wave Anodic Stripping Voltammetry

Bahinting

Rollon

Garcia‐Segura

et al. 2021

Sensors

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The widespread presence of heavy metals in drinking water sources arises as a major health concern, particularly in developing countries. The development of low-cost and reliable detection techniques is identified as a societal need to provide affordable water quality control. Herein, a bismuth film-coated gold ultramicroelectrode array (BF-UMEA) was used for the detection of Pb(II) and Cd(II) in water samples via square wave anodic stripping voltammetry (SWASV). Experimental parameters such as deposition time, Bi(III) concentration, acetate buffer concentration, pH, square wave frequency, amplitude, and step potential were all varied to determine their effects on the current peak intensities of the target metal ions. Ten-fold excess in the concentration of interferences was found to cause a decrease in the stripping peak areas of Cd(II) and Pb(II) in the following order of magnitude: benzene < NaCl < Ni(II) < Cu(II). Using Box–Behnken design, the optimum SWASV parameters that provided maximum current peak areas were 14.76 Hz (frequency), 50.10 mV (amplitude), and 8.76 mV (step potential). The limits of detection of the as-prepared BF-UMEA were 5 and 7 µg L−1 for Pb(II) and Cd(II), respectively. These results demonstrate the potential use of a BF-UMEA in SWASV for the trace quantification of Pb(II) and Cd(II) in water samples.

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Insights into the anodic stripping voltammetric behaviour of copper film electrodes for determination of trace mercury

Cited by 17 publications

References 18 publications

Copper Film Modified Glassy Carbon Electrode and Copper Film with Carbon Nanotubes Modified Screen-Printed Electrode for the Cd(II) Determination

Copper Film Modified Glassy Carbon Electrode and Copper Film with Carbon Nanotubes Modified Screen-Printed Electrode for the Cd(II) Determination

The Use of Factorial Design and Simplex Optimization to Improve Analytical Performance of In Situ Film Electrodes

Bismuth Film-Coated Gold Ultramicroelectrode Array for Simultaneous Quantification of Pb(II) and Cd(II) by Square Wave Anodic Stripping Voltammetry

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