Electrolyte analysis test strip, electrolyte analysis device, and electrolyte analysis method

An electrolyte analysis device comprising:

• an electrolyte analysis test strip;
• and
• a main body, wherein
• the electrolyte analysis test strip includes
• a substrate extending in one direction from one end to another end,
• first and second ion sensitive electrodes provided in a specific region that is defined closer to the one end than the other end in the one direction on a main surface of the substrate, the first and second ion sensitive electrodes being configured to respectively generate first and second potentials corresponding to concentrations of first and second ions species contained in an electrolyte;
• first and second main extraction electrodes respectively extending from the first and second ion sensitive electrodes toward the other end and configured to electrically draw out the potentials of the corresponding ion sensitive electrodes;
• a solution detection electrode provided between the specific region and the other end in the one direction on the main surface, and configured to detect whether or not the solution detection electrode is in contact with the electrolyte;
• and
• an auxiliary extraction electrode extending from the solution detection electrode toward the other end in a manner separated from the first and second main extraction electrodes and configured to electrically draw out a potential of the solution detection electrode, wherein
• the main body includes
• a connector including contact electrodes that respectively correspond to and come into contact with the first main extraction electrode, the second main extraction electrode, and the auxiliary extraction electrode, when the other end of the electrolyte analysis test strip is inserted in the connector,
• a solution detection processing unit configured to detect, via the auxiliary extraction electrode, that the electrolyte has come into contact with the solution detection electrode when the electrolyte comes into contact with the solution detection electrode in a mounted state in which the other end of the electrolyte analysis test strip is inserted in the connector;
• and
• a calibration processing unit configured, triggered by a detection that a standard solution as the electrolyte has come into contact with the solution detection electrode, to start determining whether a potential difference between the first and second potentials obtained through the first and second main extraction electrodes becomes constant, and when the potential difference becomes constant within a predetermined calibration period, to perform a calibration based on the constant potential difference to obtain a parameter;
• the standard solution contains the first ion species and the second ion species at a predetermined concentration ratio;
• and
• the main body further includes a calculation unit configured to calculate a concentration ratio between the first ion species and the second ion species contained in a measurement target solution as the electrolyte using the parameter obtained by the calibration.