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Aleksenko, Svetlana S.; Gumenyuk, A. P.; Mushtakova, S. P.

doi:10.1023/a:1014488114371

Cited by 12 publications

(8 citation statements)

References 6 publications

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“…A solution of Rh(III) chloride was prepared in 3.0 M HCl, and its concentration was determined as 3.80 9 10 -3 M. This stock solution was further diluted, and in each kinetic run the Rh(III) chloride concentration was in the order of 10 -6 M. In view of the literature reported earlier [32][33][34][35], it can be concluded that the original solution of Rh(III) chloride will contain the lone species [RhCl 5 (H 2 O)] 2-. This assumption is supported by the nil effect of [Cl -] on the rate of oxidation and also by the spectra.…”

Section: Discussionmentioning

confidence: 99%

Kinetics of oxidation of d(+)melibiose and cellobiose by N-bromoacetamide using a rhodium(III) chloride catalyst

Singh

Srivastava

et al. 2010

Transition Met Chem

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The kinetics of oxidation of the sugars D(?)Melibiose (mel) and Cellobiose (cel) by N-bromoacetamide (NBA) in the presence of Rh(III) chloride as homogeneous catalyst in acidic medium at 45°C have been investigated. The reactions are first-order with respect to [NBA], [Rh(III)] and [substrate]. The rate is proportional to [H ? ]. No effects of [Hg(II)], [NHA] or [Cl -] on the rates were observed. Ionic strength and dielectric constant also have little effect. The observed kinetic data, available literature and spectroscopic evidence lead us to conclude that NBAH ? and [RhCl 5 (H 2 O)] 2-are the reactive species of NBA and Rh(III) chloride, respectively. The rate-determining step of the proposed reaction path common for both sugars gives an activated complex by the interaction of a charged complex species and neutral sugar molecule, which in the subsequent steps disproportionates into the reaction products with the regeneration of catalyst. The reactions have been studied at four different temperatures and with the help of first-order rate constant values, various activation parameters have been calculated. The main oxidation products of the reactions were identified as arabinonic acid, formic acid and lyxonic acid in the case of mel and arabinonic acid and formic acid in the case of cel.

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Section: Discussionmentioning

confidence: 99%

Kinetics of oxidation of d(+)melibiose and cellobiose by N-bromoacetamide using a rhodium(III) chloride catalyst

Singh

Srivastava

et al. 2010

Transition Met Chem

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“…Recently developed CE techniques play an increasingly important role in discriminating the speciation pattern of a diversity of chemical forms of metals (chromium [79,83,94,95,105,232,233], including characterization of hydrolyzed Cr(III) species regarding the degree of oligomerization [234], iron [79,177,187,235,236], mercury [237,238], cobalt [154,189,190], vanadium [79,239], nickel [113,114], rhodium [240][241][242], rhenium [243]), metalloids (arsenic [78,104,146,180,211,244,245], with one of the best CE performance examples on the number of separated As species [211], selenium [88,102,104,118,147,[246][247][248], antimony [147], tellurium [104]), and nonmetals (nitrogen [156,…”

Section: Speciation Analysismentioning

confidence: 99%

Capillary electrophoresis of inorganic ions: An update

Timerbaev

2004

Electrophoresis

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This review as a sequel of three earlier similar reports gives a summary of the progress and significant methodological developments, starting from 2002, in the use of capillary electrophoresis (CE) for inorganic ion analysis. As substantiated by the illustrative number of relevant references, improvements in sensitivity achieved both in and outside a CE system, advances in manipulating the separation selectivity, novel hardware configurations, and system performance innovations are continually being reported over the review period. Specifically viewed are the recent advancements in elemental (bio)speciation analysis, which remains one of the most fertile areas of CE research, as well as in three recently booming research topics: contactless conductivity detection, separations on microchips, and transient isotachophoretic preconcentration. A state-of-the-art picture of technique's potentialities within the field of interest presented here demonstrates that CE has become recognized and is growing in acceptance as a reliable alternative to traditional analytical methods such as high-performance liquid chromatography (HPLC).

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“…The speciation information gained should be allowed further insight into the mechanism of catalytic kinetic reactions utilized for highly sensitive determination of Rh(III). The same group [147] showed the possibility of studying the speciation of Rh(III) by CE using a model solution of rhodium Rh in 0.1 M HCl as an sample recently. The revealed Rh species were identified by their absorption spectra.…”

Section: Pt-group Elementsmentioning

confidence: 99%

Elemental speciation analysis in capillary electrophoresis

Liu

Cheng

2003

Electrophoresis

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The growing awareness of the strong development of the toxicity of heavy metals upon their chemical forms has led to an increasing interest in the qualitative and quantitative determination of specific metal species. Speciation has therefore become an important topic of present-day analytical research. The development in the elemental speciation analysis by capillary electrophoresis (CE) is reviewed. Various CE separation modes and detection techniques applied are discussed. A comprehensive description of reported methods to date in CE speciation analysis including metals, metalloids and nonmetallic elements is demonstrated. Some examples are presented to demonstrate CE's ability to solve real-world speciation analysis with emphasis on the applications in biological and environmental samples. Further, some issues concerning the limitations and the future of CE with regard to speciation studies are also discussed.

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Untitled

Cited by 12 publications

References 6 publications

Kinetics of oxidation of d(+)melibiose and cellobiose by N-bromoacetamide using a rhodium(III) chloride catalyst

Kinetics of oxidation of d(+)melibiose and cellobiose by N-bromoacetamide using a rhodium(III) chloride catalyst

Capillary electrophoresis of inorganic ions: An update

Elemental speciation analysis in capillary electrophoresis

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