| 摘要 |
PURPOSE:To eliminate an electrolytic current by disturbing substance, by applying different electric potential to a working electrode provided in a flow cell and subtracting or adding the electrolytic current obtained from each electrode. CONSTITUTION:A flow cell 1 is provided a counter electrode 10, a reference electrode 11 and working electrodes 13, 14. A constant electric potential generator 2 is connected with the electrodes 11, 10 and also, three poles type potentiostat circuit is constituted between working electrode potential terminals 20, 21. The terminals 20, 21 are connected with each electrode 13, 14 through an inner circuit corresponding to an I-V converter 3 and mutually independent potential is applied. An output from each inner circuit is subtracted or added by an operational and electric power amplifier 4 and an electrolytic current component of disturbing substance other than measuring object substance is eliminated and computed output is recorded on a recorder 6. |
