title: Liquid state membrane electrode sensitive to Ln(III).
abstract: A liquid ion-exchange electrode containing a chloroform solution of the complex of Ln(III) (Gd, La) with tetraphenyl ester of imidodiphosphoric acid is described. The slope of the calibration graph (electrode potential vs concentration) is 18.5 mV/pLn in the pLn range 4.7-2 (pH = 5). Fe(III), Al(III), Co(II), Ni(II) and Ca(II) ions do not interfere, unlike ions of other lanthanides. It was found that the electrode might be applied to detect the end point of the titration of Ln(3+) ions.
authors.affiliation: Department of Instrumental Analysis, Faculty of Chemistry, A. Mickiewicz University, Poznań, Poland.
authors.forename: W
authors.initials: W
authors.lastname: Szczepaniak
authors.forename: M
authors.initials: M
authors.lastname: Ren