| 摘要 |
PURPOSE:To enable incorporation of an oxygen sensor into a Clarke type electrode as well without receiving the influence of disturbing ion even if the sensor is directly immersed and used in the liquid to be measured by depositing a metallic complex having a function to catalyze the reduction reaction of oxygen or a high polymer compd. having a redox property on the surface of a body formed of conductive carbon. CONSTITUTION:An oxygen sensor is provided with, for example, a body 1 which is formed of conductive carbon and is coated circumferentially with an insulating material 14 consisting of ''Teflon'' 14, etc. A layer 12 consisting of a metallic complex (for example, cobalt-porphyrin complex, iron-porphyrin complex) having a function to catalyze the reducing reaction of oxygen or a high polymer compd. (polyxylyl biologen, polymethylbiologen) having a redox property is formed on the top end face of said body 11. The material forming the layer 12 is dissolved in a suitable solvent and is coated on the surface of the body. The material forming the layer 12 reduces the oxygen in the soln. by contacting therewith and the material itself is oxidized. The current occurring in the oxidation-reduction reaction thereof is taken out through the body 11. The concn. of the dissolved oxygen in the soln. is known in accordance with the current value thereof. |
