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Effect of Ethanol on the Protolytic Properties of the Vitamins B Group
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 Title & Authors
Effect of Ethanol on the Protolytic Properties of the Vitamins B Group
Ghasemi, J.; Shiri, F.;
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 Abstract
A multiwavelength spectrophotometric titration method was applied to study protolytic constants of four water-soluble vitamins, folic acid(vitamin B9 or B0), thiamine(vitamin B1), riboflavin(vitamin B2) and pyridoxal (vitamin B6) in binary ethanol-water mixtures at 25oC and an ionic strength of 0.1M NaNO3. The protolytic equilibrium constants, spectral profiles, concentration diagrams and also the number of components has been calculated from the curve fitting of the pH-absorbance data with appropriate mass balance equations by an established factor analysis model. DATAN program was used for determination of acidity constant and SPECFIT program was used for calculation of standard deviations and partial correlation coefficients. A glass electrode calibration procedure based on the four parameter equation pH
 Keywords
Vitamins B Group;Acidity Constants;DATAN;Binary solvent;Ethanol;SPECFIT/32;
 Language
English
 Cited by
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