title: Novel sulfate ion-selective polymeric membrane electrode based on a derivative of pyrilium perchlorate.
abstract: A sulfate ion-selective PVC membrane sensor based on 4-(4-bromophenyl)-2,6-diphenylpyrilium perchlorate (BDPP) as a novel sensing material is successfully developed. The electrode shows a good selectivity for sulfate ion with respect to common organic and inorganic anions. The sensor exhibits a good linear response with slope of -28.9+/-0.5 mV per decade over the concentration range of 1.0x10(-6)-1.0x10(-2) M, and a detection limit of 8.0x10(-7) M of SO(4)(2-) ions. The electrode response is independent of pH in the range of 4.0-9.0. The proposed sensor was applied as an indicator electrode in potentiometric titration of sulfate and barium ions, and to the determination of zinc in zinc sulfate tablets.
authors.affiliation: Department of Chemistry, Tehran University, Tehran, Iran.
authors.forename: Mohammad Reza
authors.initials: MR
authors.lastname: Ganjali
authors.forename: Leila
authors.initials: L
authors.lastname: Naji
authors.forename: Tahereh
authors.initials: T
authors.lastname: Poursaberi
authors.forename: Massoud
authors.initials: M
authors.lastname: Taghizadeh
authors.forename: Hooshang
authors.initials: H
authors.lastname: Pirelahi
authors.forename: Mohammad
authors.initials: M
authors.lastname: Yousefi
authors.forename: Ali
authors.initials: A
authors.lastname: Yeganeh-Faal
authors.forename: Mojtaba
authors.initials: M
authors.lastname: Shamsipur