Physicochemical Study of the Interaction of Some Water Soluble Vitamins with Veegum

Abstract

The interaction of some water soluble vitamins -thiamine hydrochloride, riboflavin, nicotinarnide, pyridoxine hydrochloride and ascorbic acid with a xmntnlorillonite clay (Veegum) has been investigated. The data obtained from the interactive studies fitted well on the isothermal equilibrium adsorption-like plots. The results were analyzed using the Langmuir's equatim The Langmuirs plot yielded reasonable linearity from which interactive constants were calculated. The theoretical maximum interactive capacity of Veegum for each of the vitamins, that is, the b-factor in mg/g, as calculated to be 21.69, 19.50, 13.67, I5.W and 3.38 respectively. The influence of some physiochemical factors such as temperature, pH, electrolytes and dielectric constant of the reaction medium and the presence of a preservative was equally examined.