title: Probing trace Pb(2+) using electrodeposited N,N'-(o-phenylene)-bis-benzenesulfonamide polymer as a novel selective ion capturing film.
abstract: A novel film modified electrode for the determination of trace lead was developed in this work. The modified electrode was prepared by the electropolymerization of N,N'-(o-phenylene)-bis-benzenesulfonamide (PBSA) as the ion capturing reagent to create the functional film. The modified electrode shows a high selectivity towards Pb(2+) over interfering cations, e.g. Cu(2+), Cd(2+), Co(2+), Ni(2+), Zn(2+), Cr(2+), and the calibration curve was linear in the concentration range of 2.0x10(-9) to 1.0x10(-7)M with correlation coefficient of 0.999. For 20min accumulation, detection limit of 1.0x10(-9)M was obtained at the signal to noise ratio of 3. Analytical availability of the modified electrode was demonstrated by the application for samples from pond water.
authors.affiliation: Department of Chemistry, Fudan University Shanghai 200433, PR China.
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.forename: Wei
authors.initials: W
authors.lastname: Li
authors.forename: Mianhong
authors.initials: M
authors.lastname: Shi
authors.forename: Jilie
authors.initials: J
authors.lastname: Kong