Abstract
A fluorometric method for the determination of sodium alkylbenzene sulfonate was investigated. The proposed method utilized the quenching effect of fluorescence of acridine orange forming a complex by reaction with the surfactant. After mixing a sample and the dye solution with stirring and allowing to stand under a definite condition, the intensity of fluorescence obtained by irradiation with a exciting light at 490 nm was measured at 525 nm by spectrofluorometer. Since the proposed method was confirmed to be better than the official method using Methylene Blue because of its simple procedure, high sensitivity, and small standard deviation, it would be available as a routing method for the determination of sodium alkylbenzene sulfonate.
