| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a gas sensor measuring selectively density of sulfur dioxide without being interfered with by coexisting hydrogen sulfide. <P>SOLUTION: In this gas sensor having a working electrode 10 and a counter electrode 5 in contact with electrolytic solution 20, a measuring gas is supplied to the working electrode 20 and reacted electrochemically, and the density of the measuring gas is measured based on a current generated between the working electrode 10 and the counter electrode 5. In the sensor, an interference gas removal part 16 comprising a material mainly composed of a water-insoluble metal sulfate is provided on a gas supply part 31 for supplying the measuring gas to the electrolytic solution 20. The interference gas removal part 16 is constituted from a material selected from a group comprising silver sulfate, lead sulfate and barium sulfate. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
