Аннотация
Potentiometric sensors based on semiconductor and metallic materials modified by electrochemical techniques are proposed. It is demonstrated that the electrochemical modification of the surface improves the electroanalytical properties of the electrodes. Nonmodified and modified electrodes are recommended for the potentiometric titration of iodides. Procedures are developed for the potentiometric determination of cyanide- and iodine-containing pesticides using GaAs- and Ti-electrodes.