title: Chelating ion-exchange resin membrane sensor for nickel(II) ions.
abstract: A chelating ion-exchange resin (1-hydroxy-2-naphthaldoxime-formaldehyde polymer) containing nitrogen and oxygen donor atoms was prepared and characterized. The resin behaves as a selective chelating ion exchanger for some metal ions. The poly(vinyl chloride)-based membrane electrode of the resin shows a Nernstian response for Ni(2+) over a wide concentration range (2.94 x 10(3)-5.87 x 10(3) mg dm(-3)) between pH 3.0 and 7.5. The electrode is found to possess adequate stability and specific selectivity with a response time of 10 s. The sensor can also be used in a partially non-aqueous medium having a 35% (v/v) non-aqueous content.
authors.affiliation: Department of Chemistry, IIT, Hauz Khas, New Delhi, India.
authors.forename: G N
authors.initials: GN
authors.lastname: Rao
authors.forename: S
authors.initials: S
authors.lastname: Srivastava
authors.forename: S K
authors.initials: SK
authors.lastname: Srivastava
authors.forename: M
authors.initials: M
authors.lastname: Singh