APPLICATION OF SIMPLE THIOETHER IONOPHORES TO SILVER ION-SELECTIVE CHEMFETS

Silver(I)-selective CHEMFET devices based on plasticized membranes hav e been developed. It has recently been shown by the authors that simpl e molecules containing a thioether group are good Ag+ sensing molecule s. In this work the monothioether diphenyl sulfide PhSPh molecule has been used as the sensing ionophore for silver CHEMFETs. The devices ha ve shown a Nernstian response, good selectivity coefficients for inter fering ions and linear responses over three decades of silver activity .