title: Extraction-spectrophotometric determination of boron with 4,6-Di-tert-butyl-3-methoxycatechol and ethyl violet.
abstract: 4,6-Di-tert-butyl-3-methoxycatechol (DBMC) has been developed as a new reagent for boron, the complex anion formed being extracted as an ion-associate with Ethyl Violet into toluene, and the absorbance measured at 610 nm. The calibration graph is linear up to 0.43 mug of boron, the molar absorptivity is 1.02 x 10(5) 1.mole(-1).cm(-1) and the relative standard deviation 1.2%. The method has been applied to the determination of boron in sea-water and river water with satisfactory results.
authors.affiliation: Department of Chemistry, Faculty of Science, Okayama University, 3-1-1 Tsushimanaka, Okayama-shi, 700 Japan.
authors.forename: M
authors.initials: M
authors.lastname: Oshima
authors.forename: K
authors.initials: K
authors.lastname: Shibata
authors.forename: T
authors.initials: T
authors.lastname: Gyouten
authors.forename: S
authors.initials: S
authors.lastname: Motomizu
authors.forename: K
authors.initials: K
authors.lastname: Tôei