title: Spectrophotometric determination of chromium (VI) with Methylene Blue.
abstract: The interaction of Cr(VI) and the thiazine dye Methylene Blue has been examined. The ion-associate formed is extractable into 1,2-dichlorethane. The optimum conditions have been established, and values obtained for the conditional extraction constant K'(ex), distribution constant K'(D) and association constant beta'. A sensitive and selective method for determination of microquantities of Cr(VI) in soils and alloys is suggested.
authors.affiliation: Department of Chemistry, Higher Institute of Agriculture, 4000 Plovdiv, Bulgaria.
authors.forename: M
authors.initials: M
authors.lastname: Kamburova