Patent ID: 8877027
Filing Date: 2014-11-04
Classification: G01N

Abstract:
1. A liquid analyzer comprising: a reference electrode that is provided with internal liquid containing a halide ion and an internal electrode in contact with the internal liquid in a space communicatively connected outside through a liquid junction part; and an ion electrode that is provided with internal liquid and an internal electrode in contact with the internal liquid in a space separated from outside by a responsive membrane, and has a measurable concentration range for a measuring target ion, the measurable concentration range being lower than concentration of the halide ion in the internal liquid of the reference electrode, wherein: the internal liquid of the ion electrode contains the measuring target ion and a halide ion; the concentration of the halide ion in the internal liquid of the ion electrode is different from the concentration of the halide ion in the internal liquid of the reference electrode; and the concentration of the measuring target ion and the concentration of the halide ion in the internal liquid of the ion electrode are such that an osmotic pressure and an isothermal point of the internal liquid of the ion electrode respectively have desired values, and the isothermal point is included in the measurable concentration range.