title: Radioisotope studies of carboxyl sites on strong acid and strong base ion-exchange resins derived from polystyrene.
abstract: The pH-dependent distribution of carrier-free radioisotopes between aqueous phases at constant ionic strength and polystyrene-divinylbenzene type exchangers reveals the presence of a secondary exchange function attributable to carboxyl groups. Cation- and anion-exchangers of the sulphonate and quaternary ammonium types possess this additional cation-exchange capacity which is, however, relatively very low in currently available commercial resins. Its influence on separations involving radioisotopes of high specific activity is discussed.
authors.affiliation: Chemical Laboratory, University of Kent at Canterbury, Canterbury, Kent, U.K.
authors.forename: G M
authors.initials: GM
authors.lastname: Armitage
authors.forename: S J
authors.initials: SJ
authors.lastname: Lyle
authors.forename: V C
authors.initials: VC
authors.lastname: Nair