THIN-FILM GOLD ELECTRODES PRODUCED BY MAGNETRON SPUTTERING - VOLTAMMETRIC CHARACTERISTICS AND APPLICATION IN BATCH INJECTION-ANALYSIS WITH AMPEROMETRIC DETECTION

Thin-film gold electrodes were produced by radio-frequency sputtering using a polyvinyl chloride foil as substrate. The voltammetric behavio r was characterized in various electrolyte solutions. In alkaline and neutral aqueous solutions reliable voltammetric measurements can be pe rformed while in acidic media some nondefined phenomena occur. A novel type of electrode for batch injection analysis (BIA) is presented whi ch is produced from circular pieces of the thin-film material. This el ectrode can be used for BIA in conventional voltammetric cells. Pulsed amperometric detection is demonstrated to be viable with thin-film go ld electrodes and shows analytical advantages over constant-potential detection in the BIA of hydrogen peroxide.