An electrochemical sensor for the determination of Cu(II) using a modified electrode with ferrocenyl crown ether compound by square wave anodic stripping voltammetry

Flores, Erick; Pìzarro, Jaime; Godoy, Fernando; Segura, Rodrigo; Gómez, Alejandra; Agurto, Nicolás; Sepúlveda, Pamela

doi:10.1016/j.snb.2017.05.058

Cited by 39 publications

(8 citation statements)

References 33 publications

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“…The incubated electrodes were used for the determination of Cu ions using DPV technique. The optimum pH value was determined to be 5.00 from this study and this result is supported by some studies [38][39][40][41][42]. At higher pH values, Cu ions cannot be detected due to the precipitation formation as hydroxide.…”

Section: Detection Of Cu(ii) On Modified Hmpd/gc Electrode By Differesupporting

confidence: 81%

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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Section: Detection Of Cu(ii) On Modified Hmpd/gc Electrode By Differesupporting

confidence: 81%

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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“…Carbon paste is often mixed with modifier to form a mixture (bulk modified), or coated with a modifier on the surface of working electrode (surface modified) (Wang, 2001;Raoof, et al, 2011). Some commonly used modifiers include crown ether (Flores et al, 2017), hematite (Wang et al, 2019), and ferrocene (Gonzalez et al, 2009;Raoof et al, 2011;Wu et al, 2010 ). Raoof et al (2011) modified carbon paste electrodes using ferrocene and obtained an optimum ferrocene composition of 0.6% with a linear concentration range of 0.03-2400 μM and a detection limit of 0.0096 μmol/L.…”

Section: Introductionmentioning

confidence: 99%

Differential Pulse Voltammetry Technique Using Ferrocene-Modified Carbon Paste Electrodes for Determination of Pb(II) In Kepok Banana

Irdhawati

Silvia

Sahara

et al. 2021

Valensi

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The voltammetry method is a field of electrochemistry that measures electric current at a certain potential, which can be used to determine the concentration of inorganic and organic compounds that can be oxidized or reduced. In this research, the differential pulse voltammetry (DPV) technique has been used to determine the content of Pb(II). The carbon paste electrode (CPE) and ferrocene-modified carbon paste electrode (CPE-Fc) were used as working electrodes. This study aims to improve the sensitivity of Pb(II) measurement. Two parameters were optimized were ferrocene composition and scan rate. The validation parameters involved the linear concentration range, detection limit, quantization limit, precision and accuracy. The optimum ferrocene composition was found at 6%, and scan rate was 15 mV/s using CPE, increase to 20 mV/s using CPE-Fc. The validation results showed the linearity using CPE-Fc wider than CPE at the peak potential of 0.515 V. The detection and quantization limit values using CPE were 0.1551 µg/L and 0.1556 µg/L, and down to 0.1089 µg/L and 0.1090 µg/L using CPE-Fc. The precision determination for both of CPE and CPE-Fc had good results, indicated by the Horwitz ratio less than two. Percentage of recovery using CPE-Fc of 85.59 8.18%. CPE-Fc at the optimum measurement conditions was used to determine the levels of Pb(II) in kepok banana, and the result was obtained 4.4306 0.0009 mg/kg. The level of Pb content was found to exceed the established threshold based on Standard National Indonesia (ISN) No. 7387:2009 which is 0.5 mg/kg.

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“…Conventional detection methods such as highperformance liquid chromatography (HPLC) are limited by high-cost equipment and sophisticated procedures, and cannot achieve in-situ measurements of heavy metal ions in complicated water bodies [2][3][4]. The portability of the device and in-situ measurement capability allows anodic stripping voltammetry to achieve rapid detection of heavy metal ions in water, and so it can be employed in online monitoring and pre-alerts of heavy metal ions in complicated water bodies [5,6]. As a core component for stripping analysis, glassy-carbon electrodes are limited by insufficient precision and detection limits for the simultaneous detection of different ions.…”

Section: Introductionmentioning

confidence: 99%

Pre-coated mercury film on glassy-carbon electrode for the simultaneous determination of Cu2+, Zn2+, Cd2+, and Pb2+ in water

Pei¹,

Yu²,

Liu³

et al. 2019

Studia UBB Chemia

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A mercury film was pre-coated on glassy-carbon electrodes to improve the precision and detection limit of the electrodes in anodic stripping voltammetry. A mixed solution containing 0.1 mg/l Zn 2+ , 0.01 mg/l Pb 2+ , 0.01 mg/l Cd 2+ , and 0.5 mg/l Cu 2+ was used to investigate the simultaneous detection of these ions by the electrode. The influence of the base solution pH and the accumulation time on the electrochemical reactions of Cu 2+ , Zn 2+ , Cd 2+ , and Pb 2+ were investigated, as well as the effect of the concentration of the film coating solution and the number of mercury coating step on the stripping signals of the four ions. Optimizing the parameters of the pre-coated mercury film improved the precision of the glassy-carbon electrode in evidence. When the base solution pH was 4.68, and the accumulation time was 300 s, the positions of the stripping peaks were optimal, and the peak signals were at a maximum. When the concentration of the film coating solution was 0.03 mol/l HgCl2, and the mercury coating step was repeated three times, the prepared electrode showed a moderately high elution peak with little noise. The optimized electrode demonstrated superior precision and detection limits in the simultaneous detection of Zn 2+ , Cd 2+ , Pb 2+ , and Cu 2+ , compared with the uncoated electrode. The calibration curves were highly linear with determination coefficients (R 2) of 0.9913 (Cu 2+), 0.9939 (Pb 2+), 0.9933 (Cd 2+), and 0.9962 (Zn 2+); the detection limits (µg/l) were 5 for Cu 2+ , 1 for Pb 2+ , 0.1 for Cd 2+ , and 10 for Zn 2+ , and the relative standard deviations obtained from five replicate experiments were 4.1% (Cu 2+), 2.1% (Pb 2+), 2.7% (Cd 2+), and 3.4% (Zn 2+). It is reasonable to suppose that the precision and detection limits of this mercury film electrode may meet the requirements for the simultaneous detection of multiple heavy metal ions in water in the natural environment.

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An electrochemical sensor for the determination of Cu(II) using a modified electrode with ferrocenyl crown ether compound by square wave anodic stripping voltammetry

Cited by 39 publications

References 33 publications

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

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

Differential Pulse Voltammetry Technique Using Ferrocene-Modified Carbon Paste Electrodes for Determination of Pb(II) In Kepok Banana

Pre-coated mercury film on glassy-carbon electrode for the simultaneous determination of Cu2+, Zn2+, Cd2+, and Pb2+ in water

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