title: Solid-contact ion-selective electrodes with highly selective thioamide derivatives of p-tert-butylcalix[4]arene for the determination of lead(II) in environmental samples.
abstract: Thioamide derivatives of p-tert-butylcalix[4]arene were used as ionophores in the development of solid-contact ion-selective electrodes based on conducting polymer poly(3,4-ethylenedioxythiophene)/polystyrene sulfonate (PEDOT/PSS) which was synthesized by electrodeposition on the glassy carbon electrodes. The typical ion-selective membranes with optionally two different plasticizers [bis(2-ethylhexyl)sebacate (DOS) and 2-nitrophenyl octyl ether (NPOE)] were investigated. The potentiometric selectivity coefficients were determined by separate solution method (SSM) for Pb(2+) over Cu(2+), Cd(2+), Ca(2+), Na(+), and K(+). High selectivity toward Pb(2+) was obtained. By applying two conditioning protocols, a low detection limit log(a(DL)) ≈ -9 was achieved. The fabricated ion-selective electrodes were used to determine Pb(2+) concentration in environmental samples. The obtained results were compared to analysis done by inductively coupled plasma mass spectrometry (ICPMS).
authors.affiliation: Laboratory of Analytical Chemistry and Centre for Process Analytical Chemistry and Sensor Technology ProSens, Åbo Akademi University, Biskopsgatan 8, 20500 Abo, Finland.
authors.forename: Marcin
authors.initials: M
authors.lastname: Guziński
authors.forename: Grzegorz
authors.initials: G
authors.lastname: Lisak
authors.forename: Tomasz
authors.initials: T
authors.lastname: Sokalski
authors.forename: Johan
authors.initials: J
authors.lastname: Bobacka
authors.forename: Ari
authors.initials: A
authors.lastname: Ivaska
authors.forename: Maria
authors.initials: M
authors.lastname: Bocheńska
authors.forename: Andrzej
authors.initials: A
authors.lastname: Lewenstam