The effect of potassium bromide on critical micelle concentrations of a cationic surfactant in buffer and nonbuffer systems. | [Pakistan Journal of Scientific and Industrial Research • 1979]

Author(s):

1. A. E Beg: Faculty of Pharmacy, University of Karachi, Karachi, Pakistan

2. Anonymous: Faculty of Pharmacy, University of Karachi, Karachi, Pakistan

3. B. J Meakin: School of Pharmacy And Pharmaceutical, University of Bath, England

4. D. J. G Davies: School of Pharmacy And Pharmaceutical, University of Bath, England

Abstract:

The effect of KBr on critical micelle concentrations (CMC`s) of a cationic surfactant, cetyltrimethyl ammonium bromide (CTAB) in the absence of buffer at pHs between 8.0-10.0 using a pH-stat technique was investigated. A study was also carried out in the presence of buffer at pH 9.2 and the results are compared. The CMCs were found to be independent of pH over the region studied. The addition of carbonate-bicarbonate buffer and KBr both reduced the CMC. The results give strong support to the fact that only the counter ions of added salt make a contribution to the shift of the CMC.

Page(s): 283-289

DOI: DOI not available

Published: Journal: Pakistan Journal of Scientific and Industrial Research, Volume: 22, Issue: 6, Year: 1979

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