Photo-switchable Ion and Enzyme Sensors. Photoinduced Potentiometric Response of Glassy Carbon Electrode Coatd with Polymer or Polymer : Enzgme Dual Membrane

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Photo-switchable ion and enzyme sensors were fabricated by the use of glassy carbon electrode coated with nonactin-doped or enzyme modified poly(vinyl chloride) (PVC) embranes. The ion sensor with nonactin-doped PVC membrane, which contained spirobenzopyran as the photosensitive dye, exhibited a potentiometric photoresponse to NH_4^+ ion in the solution. The dynamic range of the NH_4^+ ion sensor was 10^<-7>-10^<-3> M. Urea, adenosine, and asparagine sensors were prepared by coating the surface of the NH_4^+-ion sensor with urease, adenosine deaminase, and asparaginase membranes, respectively. These enzyme sensors could be used for determining the substrates at the micro mole level. The performance characteristics of these sensors were compared with those previously prepared membrane electrode sensors.
公益社団法人日本薬学会の論文
1989-12-25