Reaction of electrochemically generated radical anions with phosphorylated ureas

Будников, Г. К.; Kargina, O. Yu.; Lapshina, S. V.; Gurylev, A.; Latypov, Z. Ya.

doi:10.1007/bf00965350

Russ Chem Bull

1988

DOI: 10.1007/bf00965350

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Reaction of electrochemically generated radical anions with phosphorylated ureas

Г. К. Будников

O. Yu. Kargina

S. V. Lapshina

et al.

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2005

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“…These reactions occurred in a solution near the electrode surface and provided useful information about species. Such an approach has been earlier used for studying weak OH-and NHorganic acids [8,9]. In these reactions, oxygen radical anion acted as a strong base the protonation of which changed electrochemical parameters of the first stage of oxygen discharge.…”

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Reactions of superoxide anion radical with antioxidants and their use in voltammetry

2005

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Kinetic parameters were calculated for the electrochemical reduction of oxygen at a glassy-carbon electrode with the generation of superoxide radical anions in a 0.05 M solution of (C 2 H 5 ) 4 NI in dimethylformamide in the presence of fat-soluble antioxidants, retinol and α -tocopherol. A procedure based on the protonation of the radical anion with antioxidant molecules is proposed for the voltammetric determination of antioxidants to determine milligram amounts of retinol and α -tocopherol in model solutions (RSD = 1-2%). The calibration graphs for retinol and α -tocopherol are linear in the concentration ranges 9.7 × 10 -5 -2.3 × 10 -3 and 6.2 × 10 -4 -3.1 × 10 -3 M, respectively. The detection limits for retinol and α -tocopherol are 4.8 × 10 -5 and 4.1 × 10 -4 M, respectively. The procedure was applied to the determination of the active component (retinol and α -tocopherol) in pharmaceuticals.

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Reactions of superoxide anion radical with antioxidants and their use in voltammetry

2005

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Reaction of electrochemically generated radical anions with phosphorylated ureas

Cited by 1 publication

References 8 publications

Reactions of superoxide anion radical with antioxidants and their use in voltammetry

Reactions of superoxide anion radical with antioxidants and their use in voltammetry

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