title: Chromazurol S ion-selective electrode for chelatometric titration.
abstract: A liquid membrane type Chromazurol S ion-selective electrode has been constructed and applied to chelatometric titrations. In aqueous medium, zephiramine (benzyldimethyltetradecylammonium chloride) forms with the anion of Chromazurol S an ion-pair which is easily extracted into nitrobenzene. The extract is used as the liquid ion-exchanger for the Chromazurol S ion-selective electrode. The most suitable ion-pair concentration in the liquid ion-exchanger membrane is 10(-4)M. The linear Nernstian-response range of the Chromazurol S anion in aqueous solution is 10(-2)-10(-6)M. The electrode has been successfully applied to the chelatometric titration of Cu(II), Ni(II), Fe(III) and Pb(II) with EDTA.
authors.affiliation: Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Kataoka
authors.forename: M
authors.initials: M
authors.lastname: Shin
authors.forename: T
authors.initials: T
authors.lastname: Kambara