Detection of heavy metal ions by ISFETs in a flow injection analysis cell

P.L.H.M. Cobben, R.J.M. Egberink, J. Bomer, J.R. Haak, P. Bergveld, D.N. Reinhoudt

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    Abstract

    An ion-selective field-effect transistor (ISFET) is chemically modified with a photopolymerizable and cyanopropyl modified polysiloxane containing N,N,N',N'-tetrabutyl-3,6-dioxaoctane-dithioamide as Cd2+ ionophore. This CHEMFET has a Nerstian response (30 mV/decade) to a change of cadmium activity in aqueous solutions. Selectivity coefficients of the CHEMFET towards potassium, calcium, copper, and lead are given. Preliminary results of the CHEMFET in a flow injection analysis cell without wire bonding and polymeric encapsulation are presented.
    Original languageEnglish
    Pages (from-to)304-307
    Number of pages4
    JournalSensors and Actuators B: Chemical
    Volume6
    Issue number1-3
    DOIs
    Publication statusPublished - 1992

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