Simultaneous determination of trace Cd(II), Pb(II) and Cu(II) by differential pulse anodic stripping voltammetry using a reduced graphene oxide-chitosan/poly-l-lysine nanocomposite modified glassy carbon electrode

Guo, Zhuo; Li, Dongdi; Luo, Xian-ke; Li, Yahui; Zhao, Qi-Nai; Li, Mengmeng; Zhao, Yang-ting; Sun, Tian-shuai; Ma, Chi

doi:10.1016/j.jcis.2016.11.006

Cited by 187 publications

(66 citation statements)

References 58 publications

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“…A reduction peak was observed at −0.50 V in the reverse cathodic scan (Figure A). Quite similar voltammograms for PLL were appeared in the literature . The peak currents increased in magnitude with the scanning cycles relatively large at initial cycles slowing down with increasing number of cycles.…”

Section: Resultssupporting

confidence: 77%

“…Moreover, the sensitivity of the Ty/Fe 3 O 4 −CH/PLL/SPCE was found to be higher than the previously reported tyramine biosensors based on titania sol‐gel modified with mesoporous carbon and polycationic polymer poly(diallyldimethylammonium chloride (486 μAmM −1 cm −2 ) . Ty/Fe 3 O 4 −CH/PLL/SPCE responded rapidly to changes in tyramine concentration and reached 95 % of the steady‐state current in less than 10 s. This low response time can be attributed to the hydrogen bonds between CH and PLL and the accelerated electron transfer rate by the movement of electrons through these hydrogen bonds .…”

Section: Resultsmentioning

confidence: 66%

“…The high conductivity of PLL/SPCE could be ascribed to the electrostatic attraction between Fe(CN) 6 3−/4− and positively charged PLL molecules due to its plentiful active amino groups . In addition, the decrease in electron transfer resistance of Fe 3 O 4 NP−CH/PLL/SPCE may be attributed to the improved electron transfer rate accelerated by the movement of electrons through hydrogen bonds between CH and PLL and the presence of highly conductive Fe 3 O 4 NP on the electrode surface .…”

Section: Resultsmentioning

confidence: 99%

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Disposable Amperometric Biosensor Based on Poly‐L‐lysine and Fe₃O₄ NPs‐chitosan Composite for the Detection of Tyramine in Cheese

et al. 2019

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An amperometric tyramine biosensor based on poly‐L‐lysine (PLL) and Fe3O4 nanoparticles (Fe3O4NP) modified screen printed carbon electrode (SPCE) was developed. PLL was formed on the SPCE by the electropolymerization of L‐lysine. Subsequently, Fe3O4NP suspension prepared in chitosan (CH) solution was casted onto the PLL/SPCE. Tyrosinase (Ty) enzyme was immobilized onto the modified Fe3O4−CH/PLL/SPCE and the electrode was coated with Nafion to fabricate the Ty/Fe3O4−CH/PLL/SPCE. Different techniques including scanning electron microscopy, chronoamperometry (i–t curve), cyclic voltammetry and electrochemical impedance spectroscopy were utilized to study the fabrication processes, electrochemical characteristics and performance parameters of the biosensor. The analytical performance of the tyramine biosensor was evaluated with respect to linear range, sensitivity, limit of detection, repeatability and reproducibility. The response of the biosensor to tyramine was linear between 4.9×10−7–6.3×10−5 M with a detection limit of 7.5×10−8 M and sensitivity of 71.36 μA mM−1 (595 μA mM−1 cm−2). The application of the developed biosensor for the determination of tyramine was successfully tested in cheese sample and mean analytical recovery of added tyramine in cheese extract was calculated as 101.2±2.1 %. The presented tyramine biosensor is a promising approach for tyramine analysis in real samples due to its high sensitivity, rapid response and easy fabrication.

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Section: Resultssupporting

confidence: 77%

Section: Resultsmentioning

confidence: 66%

Section: Resultsmentioning

confidence: 99%

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Disposable Amperometric Biosensor Based on Poly‐L‐lysine and Fe₃O₄ NPs‐chitosan Composite for the Detection of Tyramine in Cheese

et al. 2019

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“…Because of a concern on the environment the widespreadly utilized hanging mercury drop and mercury film electrodes were replaced by gold , modified carbon paste or other carbon materials electrodes , electrodes modified with metals more eco‐friendly than mercury on various substrates and array of iridium microdisks for determination of copper traces. In view of the fact that preparation of chemically modified electrodes is usually time‐consuming process, simple electrochemical modification of various substrates with metal films seems to be a convenient alternative.…”

Section: Introductionmentioning

confidence: 99%

Sensitive Anodic Stripping Voltammetric Copper Ions Determination Performed in Double Deposition and Double Stripping Steps System for Real Water Samples Analysis

Gęca

Ochab

2020

Electroanalysis

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The article reports on utilization of double deposition and stripping steps for increasing sensitivity of Cu(II) determination by anodic stripping voltammetry (ASV) at two lead film working electrodes. A significant preconcentration of copper was achieved thanks to utilization of a simple design of four electrodes system that gives possibility to perform one measurement cycle consisting of two deposition and two stripping steps. Due to the fact that deposition step is doubled, the concentration of Pb(II) needed to lead film electrodes formation was significantly reduced as compared to traditional procedures using three electrodes system. The analytical procedure of Cu(II) determination was optimized. The experimental factors: supporting electrolyte's pH and its concentration, lead ions concentration, potential and time of deposition at both working electrodes were studied. The Cu(II) peak current was linearly dependent on its concentration from 5×10−10 to 2×10−8 mol L−1 (deposition time of 270 and 160 s at the first and the second working electrode, respectively). The obtained detection limit for copper ions determination was 2.1×10−10 mol L−1. The described procedure was validated by analysis of two water certified reference materials. The described procedure was also utilized for real water sample analysis.

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“…Due to serious hazardous effects of heavy metal ions on human health and toxicity in the environment [7], it is important to develop a simple and highly effective removal method as well as sensitive analytical method for environmental pollutants to improve the quality of the environment and the human life.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Cr(VI) onto Hybrid Membrane of Carboxymethyl Chitosan and Silicon Dioxide

Deng

Kano

Inoue

2017

Journal of Chemistry

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In this study, a new adsorbent material was synthesized by using carboxymethyl chitosan and silicon dioxide. The hybrid membrane was used as an adsorbent for the removal of Cr(VI) from aqueous solutions. The adsorption potential of Cr(VI) by the hybrid materials was investigated by varying experimental conditions such as pH, contact time, and the dosage of the hybrid membrane. Adsorption isotherms of Cr(VI) onto the hybrid membrane were studied with varying initial concentrations under optimum experiment conditions. The surface property of the hybrid membrane was characterized by SEM (scanning electron microscope) and Fourier transform infrared spectrometer (FTIR). The concentrations of Cr(VI) in solution are determined by ICP-AES (inductively coupled plasma atomic emission spectrometry). The present study investigates the adsorption mechanisms of Cr(VI) onto the hybrid membrane. The results provide new insight, demonstrating that the modified hybrid membrane can be an efficient adsorbent for Cr(VI) from the aqueous solution.

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Simultaneous determination of trace Cd(II), Pb(II) and Cu(II) by differential pulse anodic stripping voltammetry using a reduced graphene oxide-chitosan/poly-l-lysine nanocomposite modified glassy carbon electrode

Cited by 187 publications

References 58 publications

Disposable Amperometric Biosensor Based on Poly‐L‐lysine and Fe₃O₄ NPs‐chitosan Composite for the Detection of Tyramine in Cheese

Disposable Amperometric Biosensor Based on Poly‐L‐lysine and Fe₃O₄ NPs‐chitosan Composite for the Detection of Tyramine in Cheese

Sensitive Anodic Stripping Voltammetric Copper Ions Determination Performed in Double Deposition and Double Stripping Steps System for Real Water Samples Analysis

Adsorption of Cr(VI) onto Hybrid Membrane of Carboxymethyl Chitosan and Silicon Dioxide

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Simultaneous determination of trace Cd(II), Pb(II) and Cu(II) by differential pulse anodic stripping voltammetry using a reduced graphene oxide-chitosan/poly-l-lysine nanocomposite modified glassy carbon electrode

Cited by 187 publications

References 58 publications

Disposable Amperometric Biosensor Based on Poly‐L‐lysine and Fe3O4 NPs‐chitosan Composite for the Detection of Tyramine in Cheese

Disposable Amperometric Biosensor Based on Poly‐L‐lysine and Fe3O4 NPs‐chitosan Composite for the Detection of Tyramine in Cheese

Sensitive Anodic Stripping Voltammetric Copper Ions Determination Performed in Double Deposition and Double Stripping Steps System for Real Water Samples Analysis

Adsorption of Cr(VI) onto Hybrid Membrane of Carboxymethyl Chitosan and Silicon Dioxide

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Product

Resources

About

Disposable Amperometric Biosensor Based on Poly‐L‐lysine and Fe₃O₄ NPs‐chitosan Composite for the Detection of Tyramine in Cheese

Disposable Amperometric Biosensor Based on Poly‐L‐lysine and Fe₃O₄ NPs‐chitosan Composite for the Detection of Tyramine in Cheese