title: Determination of poly(oxyethylene) non-ionic surfactants by two-phase titration.
abstract: The solvent extraction of non-ionic surfactants with sodium hydroxide and tetraphenylborate has been studied, and a method developed for the determination of non-ionic surfactants by two-phase titration. A hydrophobic indicator system was used. The method is valid only when the concentration of anionic surfactant in the sample solution is lower than 1 x 10(-4)M.
authors.affiliation: Laboratory of Chemistry, Kochi Medical School, Oko, Nankoku, Kochi 781-51, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Tsubouchi
authors.forename: Y
authors.initials: Y
authors.lastname: Tanaka