US 11,733,200 B2
Electrochemical oxygen sensor
Naohisa Kitazawa, Kyoto (JP); Emi Kuromatsu, Kyoto (JP); and Tadashi Kakeya, Kyoto (JP)
Assigned to MAXELL, LTD., Kyoto (JP)
Appl. No. 17/273,553
Filed by Maxell, Ltd., Kyoto (JP)
PCT Filed Oct. 17, 2018, PCT No. PCT/JP2018/038621
§ 371(c)(1), (2) Date Mar. 4, 2021,
PCT Pub. No. WO2020/079769, PCT Pub. Date Apr. 23, 2020.
Prior Publication US 2021/0255135 A1, Aug. 19, 2021
Int. Cl. G01N 27/404 (2006.01); G01N 27/30 (2006.01); G01N 27/413 (2006.01)
CPC G01N 27/404 (2013.01) [G01N 27/30 (2013.01); G01N 27/413 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An electrochemical oxygen sensor comprising:
a positive electrode;
a negative electrode; and
an electrolyte solution,
wherein the electrolyte solution comprises a chelating agent and ammonia,
wherein the electrolyte solution comprises citric acid as the chelating agent, and
wherein a concentration of the ammonia in the electrolyte solution is 0.01 mol/L or higher.