Studies of vitamin C antioxidative activity in the N-oxide surfactant solutions

[Display omitted] ► In the solutions containing N-oxides vitamin C undergoes atmospheric oxidation more readily than in pure water. ► Up to the very low AA concentration zero order kinetics is observed suggesting heterogeneous catalytic reaction. ► At higher pH more AA molecules are present in the f...

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Published in:Colloids and surfaces. A, Physicochemical and engineering aspects Physicochemical and engineering aspects, 2012-11, Vol.413, p.33-37
Main Authors: Niedziółka, K., Szymula, M., Lewińska, A., Wilk, K.A., Narkiewicz-Michałek, J.
Format: Article
Language:English
Subjects:
Aliphatic mono- and di-N-oxides
Antioxidant activity
ascorbic acid
Atmospheric oxidation
Atmospherics
Colloids
Oxidation
Spectroscopy
Surface chemistry
Surfactants
Surfactants system
Vitamin C
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container_title Colloids and surfaces. A, Physicochemical and engineering aspects
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creator Niedziółka, K.
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description [Display omitted] ► In the solutions containing N-oxides vitamin C undergoes atmospheric oxidation more readily than in pure water. ► Up to the very low AA concentration zero order kinetics is observed suggesting heterogeneous catalytic reaction. ► At higher pH more AA molecules are present in the form of ascorbate monoanion which undergoes oxidation much more readily. ► MEDA is the most effective promoter of AA oxidation. The results of vitamin C atmospheric oxidation in the N-oxide surfactant solutions obtained by UV-Vis spectroscopy are presented. As follows from our studies, in the solutions containing N-oxides vitamin C undergoes atmospheric oxidation more readily than in pure water and the rate of oxidation increases with the increasing surfactant concentration. The stabilizing effect of high surfactant concentration on vitamin C was not observed as it was the case of ionic surfactants: SDS and CTAB.
doi_str_mv 10.1016/j.colsurfa.2012.02.047
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The results of vitamin C atmospheric oxidation in the N-oxide surfactant solutions obtained by UV-Vis spectroscopy are presented. As follows from our studies, in the solutions containing N-oxides vitamin C undergoes atmospheric oxidation more readily than in pure water and the rate of oxidation increases with the increasing surfactant concentration. The stabilizing effect of high surfactant concentration on vitamin C was not observed as it was the case of ionic surfactants: SDS and CTAB.</description><identifier>ISSN: 0927-7757</identifier><identifier>EISSN: 1873-4359</identifier><identifier>DOI: 10.1016/j.colsurfa.2012.02.047</identifier><language>eng</language><publisher>Elsevier B.V</publisher><subject>Aliphatic mono- and di-N-oxides ; Antioxidant activity ; ascorbic acid ; Atmospheric oxidation ; Atmospherics ; Colloids ; Oxidation ; Spectroscopy ; Surface chemistry ; Surfactants ; Surfactants system ; Vitamin C</subject><ispartof>Colloids and surfaces. 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subjects Aliphatic mono- and di-N-oxides
Antioxidant activity
ascorbic acid
Atmospheric oxidation
Atmospherics
Colloids
Oxidation
Spectroscopy
Surface chemistry
Surfactants
Surfactants system
Vitamin C
title Studies of vitamin C antioxidative activity in the N-oxide surfactant solutions
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