Coulometric Analysis

Lingane, James J.

doi:10.1021/ja01227a013

Cited by 144 publications

(63 citation statements)

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“…This indicates a one-electrode transfer process. The value of n in each of the media studied was determined by coulometric method (16) For personal use only.…”

Section: Resultsmentioning

confidence: 99%

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Polarography of n-butylthioglycolate in aqueous media, methanol, and acetonitrile

Gupta¹,

Sharma²

1984

Can. J. Chem.

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The polarographic behaviour of n-butylthioglycolate (RSH) at the DME in aqueous media, methanol, and acetonitrile has been investigated in the presence of 0.1 M KNO3 and 0.01% thymol. The effect of pH, concentration of RSH, and drop time on the wave characteristics and the mechanism of the reaction occurring at the surface of the mercury drop have been studied. Well-defined reversible and diffusion-controlled anodic waves were obtained in aqueous media (pH 4.2), 40% methanol (pH 3.22), and 40% acetonitrile (pH 2.96). Mathematical and analytical evidence was obtained to show that the anodic wave of RSH at a dropping mercury electrode in aqueous media, 40% methanol, and 40% acetonitrile is due to the formation of the mercury complex RSHg. The dissociation constant (pK) of the mercapto group in n-butylthioglycolate is 9.6 and the diffusion coefficient in the different media are 1.17 × 10−6 cm2 s−1 (in aqueous media) 1.23 × 10−6 cm2 s−1 (in 40% methanol), and 2.43 × 10−6 cm2 s−1 (in 40% acetonitrile). The linearity of id with RSH concentration provides a rapid and precise method for the determination of RSH, down to 0.4 mM in aqueous media, methanol, and acetonitrile.

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“…This indicates a one-electrode transfer process. The value of n in each of the media studied was determined by coulometric method (16) For personal use only.…”

Section: Resultsmentioning

confidence: 99%

“…VS. log id -i/i should yield a straight line with a slope 0.0591, which has been found to be true for RSH in aqueous media, 40% methanol, and 40% acetonitrile in agreement with the one-electron transfer process. The values of n were further checked by other methods (16,17).…”

Section: Mechanism Of Electrode Reactionmentioning

confidence: 99%

Polarography of n-butylthioglycolate in aqueous media, methanol, and acetonitrile

Gupta¹,

Sharma²

1984

Can. J. Chem.

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“…The surface of the silver plate was polished by using a 0.3-μm aluminum oxide lapping film, and pre-electrolyzed to form a silver-chloride layer on it. On the silver plate, a thin channel 1 mm wide and 48 cm long was formed by using a polyester gasket made of an OHP film 0.1 mm thick (2). On the gasket, a PTFE membrane filter of 0.10 μm pore size (3) and a PTFE draining board of 3 mm thick (4) were piled up.…”

Section: ·2·1 Flow Cell With Membrane Supported Organic Phasementioning

confidence: 99%

“…Though electrochemical principles applied to coulometric works performed so far have been redox reactions [1][2][3][4][5][6][7] except for the works introduced in this review, [8][9][10][11][12][13][14][15] the ion transfer reactions at the aqueous | organic solution, W | O, interface, [16][17][18] which have been investigated extensively during the last few decades as a field of electrochemistry, are expected to provide another principle applicable to coulometry. If coulometry expands its field to the interfacial ion transfers, the precise and absolute determination becomes possible not only for species that are easily oxidized or reduced in solutions, but also for those that are not easily oxidized or reduced.…”

Section: Introductionmentioning

confidence: 99%

Rapid and Precise Coulometric Determination and Separation of Redox Inert Ions Based on Electrolysis for Ion Transfer at the Aqueous|Organic Solution Interface

Kihara¹,

Kasuno

2011

ANAL. SCI.

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“…A milestone in the development of analytical coulometry was the invention of the potentiostat by Archie Hickling (A21) in 1942 and its application for coulometric determinations [39]. Potentiostatic coulometry at mercury electrodes and the determination of the number of electrons transferred in electrode reactions were then reported by Lingane (A22) [40].…”

Section: Introductionmentioning

confidence: 99%

History of Electroanalytical Methods

Lubert

Kalcher

2010

Electroanalysis

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There are many historical reviews on electrochemistry as well as on analytical chemistry, where-as hardly any survey of the history of electroanalytical methods exists. This contribution is an approach to provide a short overview on the development of the electroanalytical methods, electrodes and electrochemical sensors. Electrogravimetry belongs to the oldest quantitative procedures introduced 1864 by Wolcott Gibbs. Roots are even older and are represented by "voltameters". Closely related to electrogravimetry is coulometry, which is also based on Faradays laws; early applications comprise determinations of atomic masses and of thin metal layers. Conductivity measurements are also a rather old analytical method, applied (with direct current) in the 18 th century already. The effective procedure was developed in the 1860s after the use of alternating current by Friedrich Kohlrausch. The Nernst equation (1889) was the base for direct potentiometry, e.g., determination of sparingly soluble electrolytes. Max Cremer is the inventor of the glass electrode (1906), which is the first electrochemical sensor. Potentiometric indication of titrations by Robert Behrend (1883) was the first instrumental indication in volumetric analysis. The invention of polarography by Jaroslav Heyrovský (1922) is the starting point of the electroanalysis with the dropping mercury electrode. The polarograph, developed in cooperation with Masuro Shikata, was the first automated analytical device. As a follow-up various methods (e.g., pulse and alternating current methods) as well as voltammetry including stripping analysis have gained importance. Further development of electroanalysis is characterized by new electrodes and electrode materials, e.g., stationary mercury electrodes, carbon-paste electrodes, chemically modified electrodes, and increased application of electrochemical sensors.

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Coulometric Analysis

Cited by 144 publications

References 0 publications

Polarography of n-butylthioglycolate in aqueous media, methanol, and acetonitrile

Polarography of n-butylthioglycolate in aqueous media, methanol, and acetonitrile

Rapid and Precise Coulometric Determination and Separation of Redox Inert Ions Based on Electrolysis for Ion Transfer at the Aqueous|Organic Solution Interface

History of Electroanalytical Methods

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