PURPOSE: To measure the concentration of O2 and H2O2 dissolved in a liquid at the same time, by providing each pair of anodes and cathodes in a diaphragm type oxygen electrode and applying different applying voltage between each electrode.
CONSTITUTION: O2 and H2O in a sample water enter into an electrolytic solution 13 passing through a diffusion film 2 provided on a sensor main body 1 which constitutes an oxygen meter. Cathodes 3, 4 and anodes 5, 6 are provided in the electrolytic solution 13. A battery 9 and an ammeter 18 are connected between the anode 5 and the cathode 3 and electric potential for reducing only H2O2 in the sample water is applied and then, an electric current A1 at this time is measured. Further, a battery 12 and an ammeter 11 are connected between the anode 6 and the cathode 4 and the electric potential for reducing O2 and H2O2 is applied and then, an electric current A2 at this time is measured. O2 is measured separately from H2O2 in a short time because the concentration of H2O2 in the sample water corresponds to the current A1 and that of O2 corresponds to the current A2-A1.
UCHIDA SHIYUNSUKE
NAKAYAMA NORIO
HITACHI ENG CO LTD
| JPS5648549A | 1981-05-01 |