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Mechanism of Lecithin Adsorption at a Liquid/Liquid Interface
- 1.0181634 - UFCH-W 20030055 RIV US eng J - Journal Article
Mareček, Vladimír - Lhotský, Alexandr - Jänchenová, Hana
Mechanism of Lecithin Adsorption at a Liquid/Liquid Interface.
Journal of Physical Chemistry. B. Roč. 107, č. 19 (2003), s. 4573-4578. ISSN 1089-5647
R&D Projects: GA ČR GA203/00/0636
Institutional research plan: CEZ:AV0Z4040901
Keywords : adsorption * mechanism of lecithin * liquid/liquid interface
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 3.679, year: 2003
Adsorption of L - .alfa.-lecithin (dipalmitoyl) at the water|1,2-dichloroethane interface has been studied by cyclic voltammetry. It has been found that the voltammetric peak in acidic medium corresponds to the desorption of the protonated form of lecithin. Its surface concentration is controlled by a surface chemical reaction of the zwitter-ionic form of adsorbed lecithin with hydroxonium ion. The whole process is complemented by the potential dependent adsorption/desorption equilibrium of the protonated form of lecithin. Its concentration in the organic phase is affected by the acid-base equilibrium.
Permanent Link: http://hdl.handle.net/11104/0078170
Number of the records: 1