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Journal of Chemistry
Volume 2014, Article ID 293972, 8 pages
Research Article

Salt Effect on the Cloud Point Phenomenon of Amphiphilic Drug-Hydroxypropylmethyl Cellulose System

1Surfactant Research Chair, Department of Chemistry, College of Science, King Saud University, Riyadh 11541, Saudi Arabia
2Department of Chemistry, Aligarh Muslim University, Aligarh 202002, India

Received 12 January 2014; Revised 20 March 2014; Accepted 20 March 2014; Published 13 April 2014

Academic Editor: Jean-Luc Blin

Copyright © 2014 Mohd. Sajid Ali et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Supplementary Material

Supplementary Figure 1: Critical micelle concentration (CMC), at which the formation of micelles of an amphiphilic substance takes place, can be determined by using conductivity measurements. The CMC values can be taken from the intersection of the two straight lines drawn before and after the intersection point in the specific conductivity versus [amphiphile] plots. Whereas in case of the polymer–amphiphile mixtures the plots of specific conductivity versus [amphiphile] show two breaks, the first is called as critical aggregation concentration (CAC, onset of interaction between amphiphile and polymer) which is determined by the intersection of first and second linear parts and the CMC in this case can be obtained by the intersection point of the second and third linear parts.

  1. Supplementary Figure