Quantitative Analysis of Soap by Formation of Ion-Pair with Methylene Blue, a Simple Procedure to Show Biodegaradation of Detergents in Environmental Education of Elementary, Junior-High and Senior-High Schools

Abstract

Of two officially authorized procedures for the determination of synthetic anionic surfactants, the methylene blue method can be extended by slight modification for analysis both soap and synthetic anionic surfactants. The procedure proposed is easily employed in elementary, junior-high and senior-high schools to demonstrate experimentally the biodegradation of soap and synthetic anionic surfactants, giving an assistance to teachers and students in their study on the environment.