A study of molecular complex formation between propyl gallate and ascorbic acid in the microemulsion phase of sodium dodecyl sulfate, pentanol and water system.
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.
Szymula
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Department of Radiochemistry and Colloid Chemistry, Faculty of Chemistry, Maria Curie-Skłodowska University, M. Curie-Skłodowska Sq. 3, 20-031 Lublin, Poland. szymu@hermes.umcs.lublin.pl
Radzki
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D000975:Antioxidants / Q000737:chemistry*; D001205:Ascorbic Acid / Q000032:analysis / Q000737:chemistry*; D004655:Emulsions / Q000737:chemistry; D000439:Pentanols / Q000737:chemistry*; D011435:Propyl Gallate / Q000737:chemistry*; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D014867:Water / Q000737:chemistry*
D000975:Antioxidants; D004655:Emulsions; D000439:Pentanols; D014867:Water; D012967:Sodium Dodecyl Sulfate; D011435:Propyl Gallate; D001205:Ascorbic Acid