| 摘要 |
To provide a reference electrode capable of improving a product life cycle without necessity of using a gelled hydrophobic ionic liquid having a prescribed or more hardness or viscosity and having a large thickness and the like so as to be difficult to manufacture, the reference electrode 100 is provided with a housing 3 for accommodating an internal electrode 1 and a filler 2 for electrically connecting the internal electrode 1 and a sample liquid 4. The filler 2 is formed to have a layer between the internal electrode 1 and an opening 31 formed in the housing 3 for contacting the sample liquid 4 and the filler 2. The filler 2 includes: a first layer 21 which includes a water soluble electrolytic solution formed to be in contact with the internal electrode 1; a second layer 22 which includes a hydrophobic ionic liquid formed to be in contact with the first layer; and a third layer 23 which includes a gelled hydrophobic ionic liquid formed in the opening 31 so as to be in contact with the second layer 22. |
