BIROn - Birkbeck Institutional Research Online

Effect of a mixture of caffeine and nicotinamide on the solubility of vitamin (B2) in aqueous solution

Evstigneev, M.P. and Evstigneev, V.P. and Hernandez Santiago, A.A. and Davies, David B. (2006) Effect of a mixture of caffeine and nicotinamide on the solubility of vitamin (B2) in aqueous solution. European Journal of Pharmaceutical Sciences 28 (1-2), pp. 59-66. ISSN 0928-0987.

[img]
Preview
Text
Binder1.pdf

Download (374Kb) | Preview
Official URL: http://dx.doi.org/10.1016/j.ejps.2005.12.010

Abstract

The effect of caffeine (CAF) and nicotinamide (NMD) on the solubility of a vitamin B2 derivative (FMN) has been evaluated for mixtures containing either a single hydrotrope (CAF or NMD) or the two hydrotropes simultaneously. A model for analysis of ternary systems, which takes into account all possible complexes between the molecules, has been developed and tested with experimental NMR data on the three-component mixture FMN–CAF–NMD. The results indicate that special attention should be given to the concentration of a hydrotropic agent used to enhance the solubility of a particular drug. A decrease in the efficacy of solubility of the vitamin on addition of large amounts of hydrotropic agent is expected in the two-component systems due to the increased proportion of self-association of the hydrotrope. It is found that a mixture of two hydrotropic agents leads to an increase in the solubility of the vitamin in three-component compared to the two-component system. Rather than using just one hydrotropic agent, it is proposed that a strategy for optimising the solubility of aromatic drugs is to use a mixture of hydrotropic agents.

Item Type: Article
Keyword(s) / Subject(s): solubility, caffeine, nicotinamide, vitamin B2, hetero-association
School or Research Centre: Birkbeck Schools and Research Centres > School of Science > Biological Sciences
Depositing User: Sandra Plummer
Date Deposited: 19 Jun 2006
Last Modified: 17 Apr 2013 12:32
URI: http://eprints.bbk.ac.uk/id/eprint/382

Archive Staff Only (login required)

Edit/View Item Edit/View Item