G - Physics – 01 – N
Patent
G - Physics
01
N
324/25
G01N 27/49 (2006.01)
Patent
CA 1210065
ABSTRACT OF THE DISCLOSURE Two dissolved gas components in sample water, for example, oxygen and hydrogen in core water, are readily quantitatively determined in one and same membrane-type oxygen meter by using a membrane producing an overlapped potential region where a potential region for an oxidation limiting current plateau is overlapped with that for a reduction limiting current plateau between two dissolved gas components, and applying to between a pair of an electrode and a counter-electrode a more positive potential than the equilibrium potential for oxidation-reduction reaction of one of the two dissolved gas components principally, thereby measuring a current generated between the electrodes, and a more negative potential than the equilibrium potential for oxidation-reduction reaction of the other dissolved gas component, when desired, thereby measuring a current generated between the electrodes, and quantitatively determining a concentration of the first dissolved gas component from the latter current quantity and quantitatively determining a concentration of the other dissolved gas component from a difference between the said two current quantities.
450218
Ibe Hidefumi
Katsura Ryoei
Kitamura Masao
Nakayama Norio
Uchida Shunsuke
Hitachi Engineering Co. Ltd.
Hitachi Ltd.
Kirby Eades Gale Baker
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