Voltammetric behavior of the iron(II)-(III) and cerium(III)-(IV) couples in potentiometric titrations at constant current and amperometric titrations with two indicator electrodes

Kolthoff, I. M.; Nightingale, E. R.

doi:10.1016/s0003-2670(00)87038-5

Cited by 44 publications

(11 citation statements)

References 15 publications

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“…Therefore, the analysis of Cr VI is of considerable environmental and health importance. Several analytical methods and techniques have been used to detect Cr VI , ranging from amprometric titration18 to coulometric and flame photometric methods,19 visible‐light spectrophotometry,20 ion‐exchange chromatography,21 adsorptive stripping voltammetry,22 and electrothermal vaporization‐inductively coupled plasma‐mass spectrometry (ICP‐MS) 23. Although these techniques are precise, all of them require sophisticated instruments and time‐consuming stages.…”

Section: Introductionmentioning

confidence: 99%

Detection and determination of Cr^VI in solution using polyaniline modified quartz crystal electrode

Mirmohseni

Oladegaragoze

2002

J of Applied Polymer Sci

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Conducting polymers such as polyaniline and polypyrrole exhibit novel sensoric properties and are able to interact chemically or electrochemically with the species of interest for detection. In the current investigation, construction of a sensor based on an electrochemical reaction between Cr VI and a thin layer of polyaniline, coated at the surface of quartz crystal electrode, is reported. Polyaniline was synthesized, electrochemically, at the surface of quartz crystal electrode. It was then reduced at Ϫ0.1 V versus Ag/AgCl. The modified electrode was exposed to various concentrations of Cr VI solutions ranging from 10 Ϫ7 to 10 Ϫ1 M. Mass changes of the polymermodified electrode due to the reaction between Cr VI and polyaniline was found to be linear, corresponding to the concentration of Cr VI . The experiments in both acidic and nonacidic conditions were performed. In both conditions, linear double-logarithmic calibration curves of mass change of the polymer film versus Cr VI concentration were obtained.

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Section: Introductionmentioning

confidence: 99%

Detection and determination of Cr^VI in solution using polyaniline modified quartz crystal electrode

Mirmohseni

Oladegaragoze

2002

J of Applied Polymer Sci

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“…As noted in the literature (15)(16)(17)(18)(19), a preanodized Pt electrode has different electrochemical properties than one not preanodized, and this effect was explained (20) by the presence of dissolved oxygen in the Pt metal. The dissolved oxygen concept offers a possible explanation [ref.…”

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confidence: 86%

On Dissolved Oxygen in Bulk Platinum

Hoare

1969

J. Electrochem. Soc.

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The hydrogen overvoltage was determined on the front side of a bright Pt foil in 2N H2SO4 solution while the solution on the back side was stirred with H2, N2, or 02. No change in the ~ was detected when the foil was connected as a diaphragm and when H2 stirring was replaced with 02 stirring on the back side. With the foil connected as a bielectrode, the ~ increased after an induction period depending on the thickness of the .foil when H2 stirring was" replaced with 02 stirring on the back side. These results indicate that under anodic polarization, oxygen can be dissolved in Pt. The dissolved oxygen can penetrate to the front side of the Pt foil where its presence as dermasorbed oxygen modified the catalytic activity of the Pt surface for the H2 evolution reaction. In the absence of anodization, oxygen sorbed from solution can penetrate the Pt lattice no further than the dermasorbed region.

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“…Lee, Adams, and Bricker (111), in a study of potential vs. time curves of precathodized metal electrodes allowed to react with oxidizing solutions, concluded that gold and palladium as well as platinum undergo stepwise oxidation to produce surface films. Kolthoff and Nightingale (92) have gathered further evidence that oxide films on platinum electrodes may have profound effects on electrode reactions. The ferric-ferrous couple approaches reversibility at a platinum electrode covered with a monolayer of platinum oxide, while the same couple behaves irreversibly at a clean platinum electrode.…”

Section: Wavementioning

confidence: 99%

Polarographic Theory, Instrumentation, and Methodology

Hume¹

1960

Anal. Chem.

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Voltammetric behavior of the iron(II)-(III) and cerium(III)-(IV) couples in potentiometric titrations at constant current and amperometric titrations with two indicator electrodes

Cited by 44 publications

References 15 publications

Detection and determination of Cr^VI in solution using polyaniline modified quartz crystal electrode

Detection and determination of Cr^VI in solution using polyaniline modified quartz crystal electrode

On Dissolved Oxygen in Bulk Platinum

Polarographic Theory, Instrumentation, and Methodology

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Voltammetric behavior of the iron(II)-(III) and cerium(III)-(IV) couples in potentiometric titrations at constant current and amperometric titrations with two indicator electrodes

Cited by 44 publications

References 15 publications

Detection and determination of CrVI in solution using polyaniline modified quartz crystal electrode

Detection and determination of CrVI in solution using polyaniline modified quartz crystal electrode

On Dissolved Oxygen in Bulk Platinum

Polarographic Theory, Instrumentation, and Methodology

Contact Info

Product

Resources

About

Detection and determination of Cr^VI in solution using polyaniline modified quartz crystal electrode

Detection and determination of Cr^VI in solution using polyaniline modified quartz crystal electrode