title: Spectrophotometric determination of small amounts of tellurium with bismuthiol II.
abstract: A spectrophotomeiric method of determining small amounts of tellurium in acidic media with Bismuthiol II has been studied. The tellurium complex with bismuthiol II is extracted almost quantitatively with chloroform from a 3M hydrochloric acid solution or from a solution buffered at pH 3.5. Up to 25 mug of tellurium can be determined by measuring the absorbance of the yellow complex in the chloroform phase at a wavelength of 330 mmu, after washing the chloroform extract with a buffer solution (pH 7.5) to remove the excess reagent from the organic phase. The effects of diverse ions on the determination of tellurium have also been examined. This method is more simple and more sensitive than the methods proposed by Jankovsky et al. and by Cheng.
authors.affiliation: Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Yoshida
authors.forename: M
authors.initials: M
authors.lastname: Taga
authors.forename: S
authors.initials: S
authors.lastname: Hikime