Iodide-selective electrodes based on the silver(I) complex of a novel N-thiocarbamoylimine-dithioether derivative

Poly(vinyl chloride) membrane ion-selective electrodes (ISEs) based on the silver complex of a novel thiocarbamoylimine dithioether synthesized in our laboratories as an anion carrier have been developed. An anti-Hofmeister behaviour was obtained, and electrodes responded preferentially to iodide. The response of the electrodes was Nernstian for iodide and sub Nernstian for thiocyanate and bromide ions. Detection limits around 7.5 × 10−9M and response times of about 10s were obtained for the iodide response of these electrodes. The use of metal-complexes as ionophores in the development of anion-selective electrodes and a comparison among different iodide-responsive membranes are discussed.