title: All-solid-state carbonate-selective electrode based on a molecular tweezer-type neutral carrier with solvent-soluble conducting polymer solid contact.
abstract: Carbonate-selective membranes were prepared by incorporating a molecular tweezer-type carbonate-selective neutral carrier [N,N-dioctyl-3alpha,12alpha-bis(4-trifluoroacetylbenzyloxy)-5beta-cholan-24-amide] into a room temperature vulcanizing-type silicone rubber (3140 RTV-SR) matrix, and deposited on the planar-type electrodes (Pt containing Ag/AgCl electrodes formed on a ceramic plate) with and without an intermediary conducting polymer layer. Two types of solvent-soluble conducting polymers [poly(1-hexyl-3,4-dimethyl-2,5-pyrrolylene) or poly(3-octylthiophene-2,5-diyl)] have been examined as the solid contact material. Potentiometric properties of the resultant all-solid-state electrodes were evaluated in terms of their carbonate selectivity, response slope, potential stability and reproducibility. The sensitivity and carbonate selectivity of the SR membrane-based all-solid-state electrodes with conducting polymer solid contact were comparable to those of conventional electrodes. Experimental results also showed that the intermediary conducting polymer layer used in the all-solid-state electrodes greatly reduces the interference from dissolved oxygen.
authors.affiliation: Chemical Sensor Research Group, Department of Chemistry, Kwangwoon University, Seoul 139-701, Republic of Korea.
authors.forename: Fayi
authors.initials: F
authors.lastname: Song
authors.forename: Jeonghan
authors.initials: J
authors.lastname: Ha
authors.forename: Byungho
authors.initials: B
authors.lastname: Park
authors.forename: Tae Hyoung
authors.initials: TH
authors.lastname: Kwak
authors.forename: In Tae
authors.initials: IT
authors.lastname: Kim
authors.forename: Hakhyun
authors.initials: H
authors.lastname: Nam
authors.forename: Geun Sig
authors.initials: GS
authors.lastname: Cha