title: [Floatation spectrophotometric determination of metals with isochromatic dye ion-pairs tetrabromofluorescein-rhodamine 6G system].
abstract: The floatation spectrophotometric determination of germanium, platinum and ferrum with isochromatic dye ion-pairs formed by tetrabromofluorescein (TBF) and rhodamine 6G (R6G) is described. The association complexes of these metallic ions with rhodamine 6G floated with organic solvent were first allowed to react on basicity, and then on tetrabromofluorescein which is of the same color as rhodamine 6G. The isochromatic dye ion-pairs of R6G x TBF were floated with toluene. The floatation R6G x TBF in acetone was dissolved and the absorbance of the solution at 530 nm was measured. The sensitivity is raised because of the 2 m dyes. The molar absorptivities for Ge, Pt and Fe are greater than 10(5) L mol(-1) cm(-1).
authors.affiliation: Research Centre of Physical and Chemical Analysis, Hebei University, 071002 Baoding.
authors.forename: B
authors.initials: B
authors.lastname: Liu
authors.forename: C
authors.initials: C
authors.lastname: Chen
authors.forename: B
authors.initials: B
authors.lastname: Zuo