title: Ion-exchange properties of hypercrosslinked polystyrene impregnated with methyl orange.
abstract: A novel bipolar stationary phase (HCPS-MO) was prepared by impregnation of hypercrosslinked polystyrene (HCPS) with methyl orange (MO; 4-dimethylamino-4'-sulfoazobenzene) and its ion-exchange properties were studied. Simultaneous separation of cations and anions on HCPS-MO is possible, although it behaves preferentially as a cation-exchanger. Unusual selectivity of HCPS-MO for alkali and alkaline-earth metal cations: Na+ < Li+ approximately = K+ < Rb+ < NH4+ < Cs+ and Mg2+ < Sr2+ < Ca2+ < Ba2+ was observed. The effect of temperature on retention of alkali and alkaline-earth metal cations was studied. Separation of Na+, K+, Rb+, NH4+, Cs+, Mg2+ and Ca2+ on HCPS-MO with diluted cerium(III) nitrate solution as an eluent in single run is presented.
authors.affiliation: Division of Analytical Chemistry, Lomonosov Moscow State University, Russian Federation.
authors.forename: M G
authors.initials: MG
authors.lastname: Kiseleva
authors.forename: L V
authors.initials: LV
authors.lastname: Radchenko
authors.forename: P N
authors.initials: PN
authors.lastname: Nesterenko
mesh_terms: D001391:Azo Compounds / Q000737:chemistry*; D002852:Chromatography, Ion Exchange / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D007475:Ion Exchange Resins; D011137:Polystyrenes / Q000737:chemistry*; D013696:Temperature
chemical_list: D001391:Azo Compounds; D007475:Ion Exchange Resins; D011137:Polystyrenes; C100258:methyl orange