Study of feasibility of using Ag−AgCl electrode as reference electrode of the isfet

Abstract

The preparation, principle and measurement results of the complex ISFET with Ag−AgCl reference electrode are presented in this paper. Through experiment and theory we endeavor to show the feasibility of using the Ag−AgCl electrode which is without solution contact as reference electrode and the way of overcoming its instability; it gives a rational explanation for phenomenon of the ion sensitive field effect transistor which does not conform to Nernstian response, when we measured cations of Na⁺, Ca⁺⁺, etc. with the Ag−AgCl reference electrode.