Titration calorimetry of surfactant-drug interactions: Micelle formation and saturation studies

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Isothermal titration calorimetry (ITC) was employed to monitor the addition of five model drugs to anionic surfactant based micelles, composed of sodium dodecyl sulfate (SDS), through to the point at which they were saturated with drug. Analysis of the resultant data using this newly developed method has confirmed the suitability of the technique to acquire such data with saturation limits established in all cases. Values for the point at which saturation occurred ranged from 17 molecules of theophylline per micelle at T = 298 K up to 63 molecules of caffeine per micelle at 310 K. Micellar systems can be disrupted by the presence of additional chemicals, such as the drugs used in this study, therefore a separate investigation was undertaken to determine the critical micellar concentration (CMC) for SDS in the presence of each drug at T = 298 K and 310 K using ITC. In the majority of cases, there was no appreciable alteration to the CMC of SDS with drug present.

Original languageEnglish
Pages (from-to)36-41
Number of pages6
JournalJournal of Chemical Thermodynamics
Volume53
DOIs
Publication statusPublished - Oct 2012

Fingerprint Dive into the research topics of 'Titration calorimetry of surfactant-drug interactions: Micelle formation and saturation studies'. Together they form a unique fingerprint.

Cite this