title: The double K+/Ca2+ sensor based on laser scanned silicon transducer (LSST) for multi-component analysis.
abstract: In the present work a double ion sensor based on a laser scanned semiconductor transducer (LSST) for the simultaneous determination of K(+)- and Ca(2+)-ions in solutions has been developed. Specially elaborated ion-sensitive membrane compositions based on valinomycin and calcium ionophore calcium bis[4-(1,1,3,3-tetramethylbutyl)phenyl] phosphate (t-HDOPP-Ca) were deposited as separate layers on a silanized surface of the Si/SiO(2)/Si(3)N(4)-transducer. The proposed multi-sensor exhibits theoretical sensitivities and the detection limits of the sensor were found to be 2 x 10(-6) mol l(-1) for K(+) and 5 x 10(-6) mol l(-1) for Ca(2+). The elaborated double sensor is proposed for the first time as a prototype of a new type of multi-sensor systems for chemical analysis.
authors.affiliation: Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, Japan.
authors.forename: Yu
authors.initials: Y
authors.lastname: Ermolenko
authors.forename: T
authors.initials: T
authors.lastname: Yoshinobu
authors.forename: Yu
authors.initials: Y
authors.lastname: Mourzina
authors.forename: K
authors.initials: K
authors.lastname: Furuichi
authors.forename: S
authors.initials: S
authors.lastname: Levichev
authors.forename: M J
authors.initials: MJ
authors.lastname: Schöning
authors.forename: Yu
authors.initials: Y
authors.lastname: Vlasov
authors.forename: H
authors.initials: H
authors.lastname: Iwasaki