Measurement of activity and critical micelle concentration of cationic surfactants using a clay membrane electrode

✍ Scribed by W.U. Malik; S.K. Srivastava; D. Gupta

• Publisher: Elsevier Science
• Year: 1972
• Weight: 189 KB
• Volume: 35
• Category: Article
• ISSN: 0022-0728
• DOI: 10.1016/s0022-0728(72)80312-7

✦ Synopsis

Marshall and collaborators x-3 have prepared clay membranes which are useful in the determination of the activities of univalent and bivalent cations. Adhikari 4, Mittra 5 and Chatterjee 6 have used such clay membrane electrodes for the determination of zinc, cobalt and copper ion activities and for the determination of activities of certain ions in clay suspensions. Measurements of the activities of compounds such as tetraalkyl ammonium salts and cationic and anionic soaps have normally been carried out using polymer membranes. Very recently Adhikari 7 has used a bentonite membrane electrode to determine the activity of tetraethylammonium and tetramethylammonium ions. This paper reports the results of an investigation on the use of a bentonite membrane electrode to determine the activity and critical micelle concentrations of cetylpyridinium bromide, cetyltrimethylammonium bromide, and dodecylpyridinium bromide.