Jurado E, Fernández-Serrano M, Núñez-Olea J, Luzón G, Lechuga M. Simplified spectrophotometric method using methylene blue for determining anionic surfactants: applications to the study of primary biodegradation in aerobic screening tests. Chemosphere. 2006 Oct;65(2):278–85. doi: 10.1016/j.chemosphere.2006.02.044. PMID: 16616296.
Simplified spectrophotometric method using methylene blue for determining anionic surfactants: Applications to the study of primary biodegradation in aerobic screening tests