Kinetic determinations and some kinetic aspects of analytical chemistry

Mottola, Horacio A.; Pérez‐Bendito, Dolores; Mark, Harry B.

doi:10.1021/ac00163a014

Cited by 36 publications

(14 citation statements)

References 115 publications

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“…' Malachite green (MG), an intensely-colored dye which is used as a biological strain to differentiate between various bacteria, has a sharp absorption peak in the visible region. Oxidation reactions of MG by Mn(II1) diphosphate complex [13], Cr(1V) [14], and periodate [15] have been reported. The MGperiodate reaction, which is catalyzed by Mn(I1) has been suggested as ki-netic method for analysis of Mn(I1) [15].…”

Section: Introductionmentioning

confidence: 99%

“…Oxidation reactions of MG by Mn(II1) diphosphate complex [13], Cr(1V) [14], and periodate [15] have been reported. The MGperiodate reaction, which is catalyzed by Mn(I1) has been suggested as ki-netic method for analysis of Mn(I1) [15]. A literature survey shows that no systematic study of the malachite green-peroxydisulphate reaction has been reported.…”

Section: Introductionmentioning

confidence: 99%

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A kinetic approach for the mechanism of malachite green‐peroxydisulphate reaction in aqueous solution

Mushinga

Jonnalagadda

1992

Int J of Chemical Kinetics

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The oxidation kinetics of malachite green (MG) with peroxydisulphate ion (PDS) were investigated by monitoring the absorbance change at 618 nm, in aqueous solutions under buffered and unbuffered conditions. Under both conditions, the reaction had first order dependence on reductant and a fractionah&order (one half) dependence on the oxidant. The stoichiometric ratio between MG and PDS was 1:2. The reaction had a negative salt effect. Reaction rates were enhanced under both high or low pH relative to neutral conditions. A plausible mechanism is proposed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A kinetic approach for the mechanism of malachite green‐peroxydisulphate reaction in aqueous solution

Mushinga

Jonnalagadda

1992

Int J of Chemical Kinetics

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“…Increasing the safranine concentration up to 5 1 up to 0.001 M, and this concentration was chosen as the optimum concentration of iodide.…”

Section: Resultsmentioning

confidence: 99%

“…Various kinetic methods have been devised for the determination of silver in different samples; most of these methods have been listed in reviews (1)(2)(3). A significant number of methods are based on catalytic action of Ag(I) on ligand-exchange reactions (4,5) and slow redox processes (6)(7)(8)(9)(10)(11)(12).…”

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confidence: 99%

Fluorimetric Kinetic-FIA Determination of Ag(I) Based on Its Catalytic Effect on the Reduction Reaction of Safranine with Iodide

Safavi

Baezzat

1998

Microchemical Journal

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“…There are many kinetic methods for the determination of Cu 2+ at trace levels based on the catalytic effect of its ion on various inorganic and organic indicator reactions. [10][11][12] However, few of them have been used for the determination of copper in real samples, or samples of analytical interest. The chief shortcoming of a kinetic catalytic determination of copper is that in most cases highly sensitive methods are poorly selective, or vice versa.…”

Section: Introductionmentioning

confidence: 99%

Determination of Trace Amounts of Copper(II) by Using Catalytic Redox Reaction between Methylene Blue and Ascorbic Acid

Khan

Sarwar

2001

ANAL. SCI.

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A sensitive and selective kinetic-spectrophotometric method is proposed for the determination of µg mL -1 amounts of Cu 2+ based on its catalytic effect on the oxidation of L-ascorbic acid by Methylene Blue in a strongly acidic medium. The reaction is monitored spectrophotometrically by measuring the decrease in color intensity of Methylene Blue at 665 nm. The analysis of Cu 2+ ion is performed by a fixed-time method. At a given time of 2 min at pH 2.20 and 32˚C, the detection limit is 10 ng mL -1 and the relative standard deviation for 0.4 µg mL -1 Cu 2+ is 3.60% (n = 6). The method is free from most of the interferences and the effect of diverse ions on the determination of Cu 2+ is also reported. The proposed method is virtually specific to copper and has been satisfactorily applied to its determination in electric copper wire samples and pharmaceutical products. Results were also verified by the atomic absorption spectrometry technique (AAS).

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Kinetic determinations and some kinetic aspects of analytical chemistry

Cited by 36 publications

References 115 publications

A kinetic approach for the mechanism of malachite green‐peroxydisulphate reaction in aqueous solution

A kinetic approach for the mechanism of malachite green‐peroxydisulphate reaction in aqueous solution

Fluorimetric Kinetic-FIA Determination of Ag(I) Based on Its Catalytic Effect on the Reduction Reaction of Safranine with Iodide

Determination of Trace Amounts of Copper(II) by Using Catalytic Redox Reaction between Methylene Blue and Ascorbic Acid

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