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Khustenko, L. A.; Ларина, Л. И.; Nazarov, B. F.

doi:10.1023/a:1022694606107

Cited by 19 publications

(12 citation statements)

References 5 publications

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“…However, significant interference is observed from Fe 3+ , Cu 2+ , and Hg 2+ ions that have K Pot > +1. NH 4 F is used to end the effect of iron by the formation of stable electrochemical inert complexes of the composition [FeF 5 ] 2− . Cu 2+ and Hg 2+ ions have interferences based on conformational change mediated by Pb 2+ coordination .…”

Section: Resultsmentioning

confidence: 99%

A sensor of m‐cresol nanopolymer/Pt‐electrode film for detection of lead ions by potentiometric methods

2016

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A sensor of m-cresol polymer film-coated platinum electrode has been fabricated for the detection of lead (II) ions (Pb 2+ ) in aqueous solutions. The study was carried out by the simple potentiometric method by measuring its potentiometric response slope and was confirmed by the cyclic voltammetry technique. The effects of the polymer film thicknesses and the pH of Pb 2+ solution on the response of the sensor were studied. Moreover, the stability, sensitivity, and selectivity of the m-cresol sensor were studied. The best thickness of polymer film was about three cyclic voltammetric runs. This film has Nernstian response slope of 26.5 mV/decade with a detection limit of 1.0 × 10 −7 M at 293 K by the simple potentiometric method. Also, it has a sensitivity of 1.1 × 10 −6 /AM with a detection limit of 7.0 × 10 −7 M by the cyclic voltammetry method. Moreover, the sensor is selective to Pb 2+ ions in the presence of other ions, such as Na + , K + , Mg 2+ , Ca 2+ , Co 2+ , Ni 2+ , and Zn 2+ . Also, the highest response of the sensor to the Pb 2+ ions is achieved over a pH range of 4.0-5.3. The lifetime of the sensor is more than 1 month. The sensor was applied on two natural samples, and the results were compared to the analyses of the atomic absorption spectrophotometer. K E Y W O R D Sm-cresol, Pb 2+ ions, potentiometric method, sensor

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Section: Resultsmentioning

confidence: 99%

A sensor of m‐cresol nanopolymer/Pt‐electrode film for detection of lead ions by potentiometric methods

2016

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“…Because of its strong affinity for Hg that enhances the preconcentration effect during the accumulation step, this latter is the most commonly used electrode material. A rapid glance to the literature offers a good insight of the wide range of such systems that have been reported: Au can be used as a bulk [15,17,29], film [30,31], microwire [18,32], microdisk [33], or microdisk array electrode [34].…”

Section: Introductionmentioning

confidence: 99%

Gold nanoparticles electrodeposited on glassy carbon using cyclic voltammetry: Application to Hg(II) trace analysis

Hezard¹,

Fajerwerg²,

Evrard³

et al. 2012

Journal of Electroanalytical Chemistry

191

108

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a b s t r a c tThe electrochemical determination of Hg(II) at trace level using gold nanoparticles-modified glassy carbon (AuNPs-GC) electrodes is described. Starting from HAuCl 4 in NaNO 3 , gold nanoparticles (AuNPs) were deposited onto Glassy Carbon (GC) electrodes using Cyclic Voltammetry (CV). Different deposits were obtained by varying the global charge consumed during the whole electroreduction step, depending on the number of cyclic potential scans (N). AuNPs were characterized as a function of the charge using both CV in H 2 SO 4 and Field Emission Gun Scanning Electron Microscopy (FEG-SEM). The AuNPs-GC electrodes were then applied to determine low Hg(II) concentrations using Square Wave Anodic Stripping Voltammetry (SWASV). The AuNPs-GC electrodes provided significantly improved performances in Hg(II) determination compared to unmodified GC and bare Au electrodes. It was shown that the physico-chemical properties of the deposits are correlated to the performances of the AuNPs-GC electrode with respect to Hg(II) assay. The best results were obtained for four electrodeposition cyclic scans, where small-sized particles (36 ± 13 nm) with high density (73 particles lm À2 ) were obtained. Under these conditions, a linearity range from 0.64 to 4.00 nM and a limit of detection of 0.42 nM were obtained.

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“…As a supporting electrolyte the 0.035 M H 2 SO 4 was used with the addition of 0.002 M KCl. The optimum conditions for mercury determination were previously reported and proved in paper [23].…”

Section: Instruments and Reagentsmentioning

confidence: 79%

A choice of optimal surface modifier of carbon electrodes for mercury determination by stripping voltammetry

Романенко

Ларина

2005

Journal of Electroanalytical Chemistry

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Untitled

Cited by 19 publications

References 5 publications

A sensor of m‐cresol nanopolymer/Pt‐electrode film for detection of lead ions by potentiometric methods

A sensor of m‐cresol nanopolymer/Pt‐electrode film for detection of lead ions by potentiometric methods

Gold nanoparticles electrodeposited on glassy carbon using cyclic voltammetry: Application to Hg(II) trace analysis

A choice of optimal surface modifier of carbon electrodes for mercury determination by stripping voltammetry

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