Square wave anodic stripping voltammetry determination of eco-toxic metals in samples of biological and environmental importance

Anastasiadou, Zefi D.; Jannakoudakis, P. D.; Girousi, Stella

doi:10.2478/s11532-010-0091-2

Cited by 12 publications

(12 citation statements)

References 30 publications

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“…However, determination of Cu(II) at the bismuth electrode [12][13][14][15][16][17][18][19] is usually prone to errors due to the partial overlapping of the Cu(II) and Bi(III) peaks. Three different strategies have been proposed in the literature to overcome this limitation; specifically, sequential determination of Cu(II) at a glassy carbon electrode followed by the determination of other metals after addition of Bi(III) [17,18], the addition of Ga(III) [12][13][14] or hydrogen peroxide [15,16]. Besides the difficulties related to the analytical determination of Cu(II), the interference of this metal ion on the determination of other trace metals at BiFE has seldom been addressed [12,20].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Determination of Copper(II), Lead(II) and Zinc(II) at Bismuth Film Electrode by Multivariate Calibration

2011

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In this work, simultaneous determination of Cu(II), Pb(II) and Zn(II) ions at low concentration levels (ppb) by square wave anodic stripping voltammetry on a Bi(III) film electrode plated in situ at a glassy carbon electrode (GCE) is described. A chemometric approach was used to overcome the overlapping peaks of Cu(II) and Bi(III), the competition of the electrodeposited Cu and Bi for the surface of the GCE and the formation of Cu-Zn intermetallic compounds. The construction of the multivariate calibration models, based on partial least squares regression, allowed the simultaneous determination of Cu (in the concentration range 8.0 to 20.1 ppb), Pb (2.0 to 30.0 ppb) and Zn (29.7 to 90.4 ppb) with most of the prediction errors obtained in the external validation set for the three models lower than 16, 11 and 26 %, respectively. Finally, this method was used for the determination of these trace metal ions in surface river water samples with satisfactory results [errors below 10, 5 and 32 % for Cu(II), Pb(II) and Zn(II), respectively].

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Section: Introductionmentioning

confidence: 99%

Simultaneous Determination of Copper(II), Lead(II) and Zinc(II) at Bismuth Film Electrode by Multivariate Calibration

2011

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“…The frequency value and amplitude correspond to those reported in previous works. 10,17 A reduction in capacitive currents caused by the oxidation of impurities in real blood and urine samples was observed under the proposed square-wave sweep conditions. We observe the mercury anodic dissolution peak at about 0.4 V for both types of PEs−Hg 2+ bilayers.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The use of water-soluble PEs as a method for immobilizing mercury salts on the surface of a WE will allow scaling the process of electrode modification. 16 Pulsed electroanalytical methods, such as differential-pulse ASV 11 and square-wave ASV (SWASV), 5,17 are used for reducing the noise-to-signal ratio and increasing the resolution of the anodic peaks. tetraacetate (EDTA) was proposed by Zakharchuk et al 18 Such a method has the advantage of eliminating the matrix effect of biological molecules and breaking up zinc from complexes.…”

Section: ■ Introductionmentioning

confidence: 99%

ElectroSens Platform with a Polyelectrolyte-Based Carbon Fiber Sensor for Point-of-Care Analysis of Zn in Blood and Urine

et al. 2020

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In this paper, we describe an electrochemical sensing platform—ElectroSens—for the detection of Zn based on self-assembled polyelectrolyte multilayers on the carbon fiber (CF) electrode surface. The CF-extended surface facilitates the usage of a small volume electrochemical cell (1 mL) without stirring. This approach allows making a low-cost three-electrode platform. Working electrode modification with layer-by-layer assembly of polyethyleneimine (PEI), poly(sodium 4-styrenesulfonate) (PSS), and mercury nitrate layers eliminates solution toxicity and provides stable stripping voltammetry measurements. The stable, robust, sustainable, and even reusable Ag/AgCl reference electrode consists of adsorbed 32 PEI-KCl/PSS-KCl bilayers on the CF/silver paste separated from the outer solution by a polyvinyl chloride membrane. The polyelectrolyte-based sensor interface prevents adsorption of protein molecules from biological liquids on the CF surface that leads to a sensitivity increase of up to 2.2 μA/M for Zn 2+ detection and provides a low limit of detection of 4.6 × 10 –8 M. The linear range for Zn detection is 1 × 10 –7 to 1 × 10 –5 M. A portable potentiostat connected via wireless to a smartphone with an android-based software is also provided. The ElectroSens demonstrates reproducibility and repeatability of data for the detection of Zn in blood and urine without the digestion step.

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“…Electrochemistry offers unique application possibilities in the field of heavy metal analysis due to the compact, simple and portable instrumentation, electrode miniaturisation and easy electrode modification [ 13 – 15 ]. Electrochemistry was also proved to be suitable method to analyse heavy metal contents in biological and environmental samples like body fluids, tissues or rocks [ 16 – 18 ]. Gallus domesticus hen and its embryos are broadly used as a model organism [ 19 ], where the liver represents the organ of initial Cd accumulation and recent study shows that high levels of Cd can be presented also in brain [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Automatic Electrochemical Detection of Zinc, Cadmium, Copper and Lead Ions in Environmental Samples Using a Thin-Film Mercury Electrode and an Artificial Neural Network

Kudr

Nguyen

Gumulec

et al. 2014

Sensors

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In this study a device for automatic electrochemical analysis was designed. A three electrodes detection system was attached to a positioning device, which enabled us to move the electrode system from one well to another of a microtitre plate. Disposable carbon tip electrodes were used for Cd(II), Cu(II) and Pb(II) ion quantification, while Zn(II) did not give signal in this electrode configuration. In order to detect all mentioned heavy metals simultaneously, thin-film mercury electrodes (TFME) were fabricated by electrodeposition of mercury on the surface of carbon tips. In comparison with bare electrodes the TMFEs had lower detection limits and better sensitivity. In addition to pure aqueous heavy metal solutions, the assay was also performed on mineralized rock samples, artificial blood plasma samples and samples of chicken embryo organs treated with cadmium. An artificial neural network was created to evaluate the concentrations of the mentioned heavy metals correctly in mixture samples and an excellent fit was observed (R2 = 0.9933).

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Square wave anodic stripping voltammetry determination of eco-toxic metals in samples of biological and environmental importance

Abstract: Abstract:

Cited by 12 publications

References 30 publications

Simultaneous Determination of Copper(II), Lead(II) and Zinc(II) at Bismuth Film Electrode by Multivariate Calibration

Simultaneous Determination of Copper(II), Lead(II) and Zinc(II) at Bismuth Film Electrode by Multivariate Calibration

ElectroSens Platform with a Polyelectrolyte-Based Carbon Fiber Sensor for Point-of-Care Analysis of Zn in Blood and Urine

Simultaneous Automatic Electrochemical Detection of Zinc, Cadmium, Copper and Lead Ions in Environmental Samples Using a Thin-Film Mercury Electrode and an Artificial Neural Network

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