Differential Pulse Anodic Stripping Voltammetric Determination of Traces of Copper with a Tobramycin-Nafion Modified Electrode

Li, Nian Bing; Luo, Hong Qun; Chen, Guo Nan

doi:10.2116/analsci.20.825

Cited by 12 publications

(7 citation statements)

References 28 publications

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“…A shift in peak potential (+106 mV) as well as an enhancement in peak current (2-fold) was noticed. This negative shift from +121 (bare) to 106 mV (modified) reveals that the oxidation is thermodynamically easier for this complex in Nafion [27,28]. Similar voltammogram recorded for complex 6 is shown in Fig.…”

Section: Differential Pulse Voltammetrysupporting

confidence: 66%

Electrochemical studies on [M(diars)2X2]+ where [X = Cl, Br; M = Os, Re, Ru, Rh; diars = o-phenylenebis (dimethylarsine)] at bare and Nafion modified electrodes

Suganthi¹,

Rajarajan²,

Murugesan

2008

J Appl Electrochem

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Electrochemical studies on [M(diars) 2 X 2 ] + where [X = Cl, Br; M = Os, Re, Ru, Rh; diars = o-phenylenebis (dimethylarsine)] at bare and Nafion modified electrodesAbstract The voltammetric behaviour of the M(III/II) redox couple of the complexes of the general formula [M(diars) 2 X 2 ] + where M = Os, Re, Ru, Rh and diars = o-phenylenebis-(dimethylarsine) has been investigated in aqueous and aqueous/ethanol solvents at bare and Nafion modified electrodes. The formal reduction potential falls within the range of 0.097-0.0920 V and increases with the dielectric constant of the solvent. In acertonitrile, both the oxidized and reduced forms of the complex showed no adsorption at the surface of the glassy carbon electrode as shown by cyclic voltammetry. The electrochemistry is consistent with a quasireversible one electron transfer between the di and tri cationic forms of the complexes. A current-enhancement of *2 was observed at Nafionmodified glassy carbon over the bare electrode. Well defined voltammograms were obtained at Nafion-modified glassy carbon with a detectable signal down to 10 -9 M range by differential pulse voltammetry. Electrochemical detection of dopamine in presence of [Os(4-mediars) 2 Cl 2 ] + at Nafion modified electrode indicates an increase in peak current. This shows that this complex acts as biochemicalsensor for dopamine.

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Section: Differential Pulse Voltammetrysupporting

confidence: 66%

Electrochemical studies on [M(diars)2X2]+ where [X = Cl, Br; M = Os, Re, Ru, Rh; diars = o-phenylenebis (dimethylarsine)] at bare and Nafion modified electrodes

Suganthi¹,

Rajarajan²,

Murugesan

2008

J Appl Electrochem

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“…The detection limit of the biosensor was calculated to be 0.95 μM by using 3S b /m criteria, where m is the slope of the calibration curve and S b is the standard deviation of the responses (n = 10) from 2.5 μM Cu 2+ . Table 1 shows a comparison of analytical parameters such as the linear range and detection limit of some sensors and biosensors developed for copper assay [27,28] and [32][33][34][35][36][37][38][39][40]. The biosensor offers attractive properties compared to some of previous studies such as high sensitivity, a wide linear range (2.5 μM-20.0 μM), and low detection limit (0.95 μM).…”

Section: Linear Range Of the Biosensormentioning

confidence: 99%

Do copper ions activate tyrosinase enzyme? A biosensor model for the solution

Akyılmaz

Yorganci

Asav

2010

Bioelectrochemistry

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“…There were two possible reasons for this unexpected behavior. The first was competition between H + and the metal ions [8,9]. Base solutions with different pH values have different concentrations of H + .…”

Section: Effects Of Base Solution Ph On the Stripping Curves Of The Ementioning

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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Differential Pulse Anodic Stripping Voltammetric Determination of Traces of Copper with a Tobramycin-Nafion Modified Electrode

Cited by 12 publications

References 28 publications

Electrochemical studies on [M(diars)2X2]+ where [X = Cl, Br; M = Os, Re, Ru, Rh; diars = o-phenylenebis (dimethylarsine)] at bare and Nafion modified electrodes

Electrochemical studies on [M(diars)2X2]+ where [X = Cl, Br; M = Os, Re, Ru, Rh; diars = o-phenylenebis (dimethylarsine)] at bare and Nafion modified electrodes

Do copper ions activate tyrosinase enzyme? A biosensor model for the solution

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

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