title: Detection of AU(III) ions using a poly(N,N-dimethylacrylamide)-coated QCM sensor.
abstract: A polymer-coated quartz crystal microbalance (QCM) sensor has been developed for the detection of Au(III) ions in a HCl aqueous solution. Poly(N,N-dimethylacrylamide) (poly(DMAA)) gel was used as a sensing material. The poly(DMAA) gel adsorbs Au(III) ions in the HCl aqueous solution, whereas it is inactive toward most other metal ions. The equilibrium adsorption of Au(III) ions onto the poly(DMAA) gel can be expressed by the Henry-type isotherm. The oscillation behavior of the poly(DMAA)-coated QCM sensor was investigated, and linear relationships between the resonance frequency shift and the concentration of Au(III) ions were obtained for concentrations of less than 0.032 mol/m(3) (6.3 mg/m(3)) in the single and multicomponent metal systems. The poly(DMAA)-coated QCM sensor detects Au(III) ions successfully with high selectivity and sensitivity even in the presence of other metal ions and organic compounds.
authors.affiliation: Department of Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan. Electronic address: htoku@cc.tuat.ac.jp.
authors.forename: Hideaki
authors.initials: H
authors.lastname: Tokuyama
authors.affiliation: Department of Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan.
authors.forename: Eri
authors.initials: E
authors.lastname: Kitamura
authors.affiliation: Natural Science Laboratory, Toyo Univ., 5-28-20, Hakusan, Bunkyou-ku, Tokyo 112-8606, Japan.
authors.forename: Yoshimi
authors.initials: Y
authors.lastname: Seida
keywords: Adsorption; Au(III) ion; Gel; Poly(N,N-dimethylacrylamide); Polymer; QCM sensor