Determination of traces of vanadium with the catalytic maximum wave in differential pulse polarography

Hasebe, Kiyoshi; Kakizaki, Teiji; Yoshida, Hitoshi

doi:10.1007/bf00496216

Cited by 11 publications

(6 citation statements)

References 15 publications

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“…spectively. The catalytic wave of the Mo(VI)-VMA complex in the presence of brómate ion is accompanied by a maximum wave in dc and normal pulse polarography; a typical "catalytic maximum wave" (9)(10)(11) is also observed at the reduction potential of the Mo(VI) complex from hexavalent to pentad in the DP mode (Figure 1). But, the reduction wave or peak of the Mo(V) complex to tervalent could not be confirmed because of the overlap of the brómate ion reduction wave with the wave of the Mo(V) complex.…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, we have studied the differential pulse polarographic (DPP) behavior of several metal ions in the presence of a complexing agent and brómate ions as an oxidant and applied DPP to the determination of microamounts of analytes (9,10). In the presence of mandelic acid and brómate ions, for example, microamounts of molybdenum(VI) in animal feeds have been determined by use of its catalytic reaction (11).…”

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confidence: 99%

“…Bardina and Chikryzova (12) reported the indirect determination of mandelic acid at 10"6 M by use of the catalytic effect of mandelic acid in sulfuric acid. As a result of the polarographically catalytic reaction of the Mo(VI)-hydroxy organic acid complex, an electrode reaction mechanism had been proposed by several workers (10,13). The mechanism is Mo (VI) + HA -[MoVIA]-+ H+ (1) [MoVIA]" + e -[MovA]" (2) [MovA]-+ Ox -[MovAOx]--[MovAOx]-ads (3) [MovAOx]-ads + H+ = [M0|VIA]-+ Red (4) where HA is the -hydroxycarboxylic acid such as mandelic 0003-2700/87/0359-0373S01.50/0 © 1987 American Chemical Society -E, V vs.SCE Figure 1.…”

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confidence: 99%

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Determination of vanillylmandelic acid in urine by use of catalytic maximum wave in differential pulse polarography

Hasebe¹,

Kakizaki²,

Yoshida³

1987

Anal. Chem.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Determination of vanillylmandelic acid in urine by use of catalytic maximum wave in differential pulse polarography

Hasebe¹,

Kakizaki²,

Yoshida³

1987

Anal. Chem.

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“…One of the lowest limits of detection reported for vanadium (about 7.5 X 10'9 M) is realized by use of the catalytic wave of the vanadium(IV)-pyrocatechol complex in the presence of bromate and pulse polarography (180). This limit of detection compares the determination with anodic stripping.…”

Section: Kinetic Determinations Based On Electrode Reactions and Proc...mentioning

confidence: 99%

Kinetic determinations and some kinetic aspects of analytical chemistry

Mottola¹,

Pérez‐Bendito²,

Mark³

1988

Anal. Chem.

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“…Such a wave form had been observed in our previous studies [9] as a typical catalytic hydrogen wave and is considered as a result of adsorption on the electrode surface or streaming of the solution around the electrode. However, the theory in which the maximum peak is attained is not clearly outlined.…”

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confidence: 92%

A Catalytic Hydrogen Wave of the Osmium-Cysteine System

Kawasaki

Kakizaki

et al. 1998

Electroanalysis

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In the presence of cysteine, osmium(VIII) in hydrochloric acid exhibits a well-defined maximum wave at ¹0:85 V (vs. SCE). Effects of the osmium's valence states and the coexisting anions on the reduction wave have been studied polarographically in acidic solution. The high oxidation states (e.g., osmium(VIII) and (VI)) in comparison with low oxidation states have an influence on the height of the hydrogen wave.Keywords: Osmium, Cysteine, Maximum wave, PolarographySince Herles and Vancura's [1] first observation in 1930 of an unusual wave during the polarographic analysis of blood serum solutions in ammonia buffer, the study of a catalytic wave arising from the electrode reaction that contains sulfur compounds has been the objective of numerous studies. In our previous article [2], we describe the fact that osmium(VIII) tetraoxide, in the presence of cysteine in hydrochloric acid, also results in an unusual polarographic wave. The article showed the following results for the electrode reaction:• in acidic solution, the osmium-cysteine yields a maximum wave; • the peak current reaches a maximum when the concentration ratio of osmium/cysteine is about 2000;• the peak current is enhanced by adding cysteine more than 1000 times compared to the case where no cysteine exists;• in the presence of disulfide compounds, the wave does not occur;• the adsorption at the peak potential is observed from the result of the electrocapillary curves.However, several important questions relevant for the chemical reaction in bulk solution and the electrode reaction on the electrode surface have remained unanswered. Different experimental conditions were used because this osmium-cysteine system is different from other studies. Many studies of the 'Bridicka's current' had been carried out in the pH range of 4 to 9 and metal ions such as Co 2þ or Ni 2þ were employed. Prior studies using platinum metal also used low valence state ions in mixed solvent [3]. In our study, however, a high valence state of osmium ions was used in acidic solution. It is supposed that the chemical, nonelectrochemical, redox reaction which turns the valence state into the low state of osmium takes place in the bulk because osmium tetraoxide and cysteine are oxidizing and reducing agents, respectively. Therefore, it is unknown whether the high or low states of osmium are concerned with the appearance of a maximum wave. Kadlecek et al.[4] studied the catalytic activity of structural similar thiols and found that the activity decreases with the stability decrement of their complexes with Co II ions. Few studies [5] associated with complexing between platinum metals and low molecular weight thiols have been carried out. With respect to osmium, Medyantseva et al. [3] determined Os III with 8-mercaptoquinoline in a mixture of dimethylformamide with an acetate buffer. Aliphatic thiol compounds such as cysteine, however, have not been investigated. This communication examines the interaction between osmium and cysteine, and the electrochemical behavior of the sys...

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Determination of traces of vanadium with the catalytic maximum wave in differential pulse polarography

Cited by 11 publications

References 15 publications

Determination of vanillylmandelic acid in urine by use of catalytic maximum wave in differential pulse polarography

Determination of vanillylmandelic acid in urine by use of catalytic maximum wave in differential pulse polarography

Kinetic determinations and some kinetic aspects of analytical chemistry

A Catalytic Hydrogen Wave of the Osmium-Cysteine System

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