Using a Combination of Experimental and Mathematical Method To Explore Critical Micelle Concentration of a Cationic Surfactant

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• 作者：Jelena Goronja ; Nataša Pejić ; Aleksandra Janošević Ležaić ; Dragomir Stanisavljev ; Anđelija Malenović
• 刊名：Journal of Chemical Education
• 出版年：2016
• 出版时间：July 12, 2016
• 年：2016
• 卷：93
• 期：7
• 页码：1277-1281
• 全文大小：292K
• 年卷期：0
• ISSN：1938-1328

文摘

An undergraduate electrical conductivity measurement experiment in a physical chemistry lab and basic fitting procedures are presented that allow a characterization of micellar system of hexadecyltrimethylammonium bromide (cetyltrimethylammonium bromide, CTAB) in binary mixture of water and acetonitrile (ACN) as a cosolvent (10%, v/v) at 30.0 °C. Conductivity–concentration data were processed by inbuilt function of ORIGIN software to attain the values of critical micelle concentration by method of integration. Acquiring the data-fitting skills that are developed through the addition of a computational tool to a conventional electrical conductometry experiment has a general significance for its applications to more complex upper-level experiments with the aim to process data and perform fast calculations and graphics.