DESIGN OF ION-SENSING CHEMOOPTICAL INTERFACE FOR FIBER OPTIC CHEMICALSENSORS

In recent years a great amount of different ion-sensing layers for opt ical sensors have been studied and developed. In all cases the optical signal is generated upon interaction of this layer with the analyte. The paper presents general principles in a design of the optical ion-s ensing layer so-called chemooptical interface - a receptor part of the fiber optic chemical sensors (FOGS). Several methods of reagent immob ilization in different types of sensing layers: surface and bulk membr anes are described. The mechanism of the ion-recognition by reagent mo lecules and different mechanisms of the signal processing are discusse d.