Construction and Application of an Electrochemical Sensor for Simultaneous Determination of Cd(II), Cu(II) and Hg(II) in Water and Foodstuff Samples

Afkhami, Abbas; Moosavi, Razieh; Madrakian, Tayyebeh; Keypour, Hassan; Ramezani-Aktij, Ameneh; Mirzaei-Monsef, Misagh

doi:10.1002/elan.201300619

Cited by 33 publications

(6 citation statements)

References 50 publications

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“…As shown in Figure 1 a, large RGO/CMC nanosheets are observed in the TEM image without agglomeration. FT-IR spectrum of RGO/CMC ( Figure 1 b) indicates that GO has been effectively reduced as the absorption intensity of the hydroxyl (3428 cm −1 ) and epoxy (1047 cm −1 ) were evidently decreased [ 21 ]. Furthermore, the new absorption peak appearing at 2925 cm −1 ascribed to the methyl and methylene of CMC, confirms the successful modification of CMC on the surface of RGO [ 22 , 23 ].…”

Section: Resultsmentioning

confidence: 99%

Preparation of Highly Dispersed Reduced Graphene Oxide Modified with Carboxymethyl Chitosan for Highly Sensitive Detection of Trace Cu(II) in Water

Chen

Ding

et al. 2016

Polymers

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Abstract:In this article, reduced graphene oxide (RGO)/carboxymethyl chitosan (CMC) composites (RGO/CMC) were synthesized by a hydrothermal method through in-situ reduction and modification of graphene oxide (GO) in the presence of CMC. An electrochemical sensor for the determination of Cu(II) by differential pulse anodic stripping voltammetry (DPASV) was constructed by an electrode modified with RGO/CMC. The fabricated electrochemical sensor shows a linear range of 0.02-1.2 µmol¨L´1, a detection limit of 3.25 nmol¨L´1 (S/N = 3) and a sensitivity of 130.75 µA¨µmol¨L´1¨cm´2, indicating the sensor has an excellent detection performance for Cu(II).

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Section: Resultsmentioning

confidence: 99%

Preparation of Highly Dispersed Reduced Graphene Oxide Modified with Carboxymethyl Chitosan for Highly Sensitive Detection of Trace Cu(II) in Water

Chen

Ding

et al. 2016

Polymers

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“…The increase in the peak current with time is due to the accumulation of metal ions onto the electrode interface [44]. Then, the decrease in the peak current might be due to the surface saturation on the electrode [45,46]. Hence, a pre-concentration time of 5 min has been optimized and used in all further studies.…”

Section: Effect Of Preconcentration Timementioning

confidence: 99%

CeO2 nanoparticle-modified electrode as a novel electrochemical interface in the quantification of Zn2+ ions at trace level: application to real sample analysis

Adarakatti

Ashoka

et al. 2018

J Solid State Electrochem

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A simple strategy has been proposed to quantify Zn 2+ ions using CeO 2 nanoparticle-modified glassy carbon electrode. The CeO 2 nanoparticles were prepared by sucrose-nitrate decomposition method, and it was characterized by X-ray diffraction (XRD), FT-IR, TEM, and surface area analyzer. The synthesized CeO 2 nanoparticles were used as modifier molecules as a thin film on glassy carbon electrode (GCE) in the trace level quantification of Zn 2+ by using cyclic voltammetry (CV) and differential pulse anodic stripping voltammetry (DPASV) techniques. The fabricated sensor exhibited a good analytical response towards Zn 2+ ions. The modified electrode showed a wide linearity in the concentration range 20-380 μg L −1 with a limit of detection 0.36 μg L −1 . The proposed electrochemical sensor was successfully applied to trace level Zn 2+ quantification from real sample matrices.

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“…Heavy metal may exist in food either naturally or as a consequence of anthropic sources. They have destructive effect to human health even at low concentration when ingested over a long period of time [3,4]. Thus, it is important to ensure that such heavy metal should be kept below the maximum limit that is allowed by WHO in milligrams per milliliter range [5,6].…”

Section: Introductionmentioning

confidence: 99%

A novel highly sensitive carbon-based HMPD/GC sensor electrode: copper ions analysis in flour and water samples

Durmuş¹,

Yılmaz²,

Mülazımoğlu³

et al. 2018

Desalination and Water Treatment

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a b s t r a c tIn this research, (Z)-2-(2-(hydroxyimino)-2-(3-methyl-3-phenylcyclobutyl)ethyl)-3a,7a-dihydro-1H-isoindole-1,3(2H)-dione, HMPD molecule has been grafted to the glassy carbon (GC) electrode surface. The HMPD-modified GC electrode has been originally developed and it used for the quantitative determination of Cu(II) in flour and water samples. The modification steps have been performed using cyclic voltammetry (CV). CV, electrochemical impedance spectroscopy and scanning electron microscopy have been employed for the characterization processes. Cu(II) standard solutions changing from 1.0 × 10 -9 to 1.0 × 10 -3 M have been prepared and the corresponding peak currents have been measured. From the obtained data calibration equation has been calculated I p = -1.555C cu + 15.86 which is having a 0.9974 correlation coefficient. 10.0 mL of flour and water samples have been mixed with 10.0 mL Britton-Robinson (BR) buffer solution (pH = 5.00) and HMPD/GC sensor electrode has been kept in these mixed solutions for 90 min. Differential pulse voltammetric (DPV) technique has been applied for the measurement of the peak currents. After the application of the developed sensor electrode for Cu(II) detection in flour and water samples, Cu(II) ion concentrations have been calculated from the obtained peak current values, 1.97 and 2.46 µA. The Cu(II) ion concentrations have been calculated as 1.17 × 10 -9 and 2.41 × 10 -9 M, respectively.

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Construction and Application of an Electrochemical Sensor for Simultaneous Determination of Cd(II), Cu(II) and Hg(II) in Water and Foodstuff Samples

Cited by 33 publications

References 50 publications

Preparation of Highly Dispersed Reduced Graphene Oxide Modified with Carboxymethyl Chitosan for Highly Sensitive Detection of Trace Cu(II) in Water

Preparation of Highly Dispersed Reduced Graphene Oxide Modified with Carboxymethyl Chitosan for Highly Sensitive Detection of Trace Cu(II) in Water

CeO2 nanoparticle-modified electrode as a novel electrochemical interface in the quantification of Zn2+ ions at trace level: application to real sample analysis

A novel highly sensitive carbon-based HMPD/GC sensor electrode: copper ions analysis in flour and water samples

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