Szymula M, Radzki S. A study of molecular complex formation between propyl gallate and ascorbic acid in the microemulsion phase of sodium dodecyl sulfate, pentanol and water system.
Colloids Surf B Biointerfaces 2004;
35:249-57. [PMID:
15261038 DOI:
10.1016/s0927-7765(03)00103-6]
[Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/10/2003] [Indexed: 11/22/2022]
Abstract
The association between two water-soluble antioxidants, i.e. ascorbic acid and propyl gallate have been studied by absorption spectroscopy in microemulsion formed in sodium dodecyl sulfate/pentanol/water micellar system. It has been shown that propyl gallate forms 1:1 molecular complex with ascorbic acid in every solution. Evolution of the absorption spectra during the study of molecular complex formation goes through well-defined isosbestic points. The association constants were calculated using curve-fitting procedure. The observed interactions are stronger in the less polar solvents.
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