title: Spectrophotometric determination of tetrafluoroborate with ferroin.
abstract: A spectrophotometric method for determination of the tetrafluoroborate anion with ferroin is described. The ferroin tetrafluoroborate is selectively extracted in the presence of excess of ferroin into n-butyronitrile, and the absorbance of the organic extract is measured at 520 mmicro. Beer's law is followed over a wide range of tetrafluoroborate concentrations when a single extraction procedure is used. Exhaustive extractions indicate that 74 % of the tetrafluoroborate is removed in a single extraction.
authors.affiliation: Department of Chemistry, University of Wyoming, Laramie, Wyoming 82070, U.S.A.
authors.forename: V S
authors.initials: VS
authors.lastname: Archer
authors.forename: F G
authors.initials: FG
authors.lastname: Doolittle
authors.forename: L M
authors.initials: LM
authors.lastname: Young