Analysis device and method for determining presence or absence of abnormality

An analyzing apparatus that measures a concentration of electrolytes in a sample, the analyzing apparatus comprising:

• a plurality of ion selective electrodes that acquire a potential based on the concentration of electrolytes;
• a reference electrode that acquires a potential based on a reference solution;
• a flow passage through which the sample or the reference solution is supplied to the ion selective electrodes and the reference electrode;
• a plurality of driving units that control the flow passage, aspirate the sample, discharge the sample, aspirate the reference solution, and discharge the reference solution;
• a potential measurement unit that measures electromotive force between a potential acquired by the ion selective electrodes and a potential acquired by the reference electrode;
• a waveform acquisition unit that acquires a waveform representing a change in the electromotive force;
• a waveform analyzing unit that performs analysis using the change in the electromotive force;
• and
• a driving control unit that outputs a control signal to one or a plurality of the driving units in relation to each of a plurality of driving timings related to a component to be replaced, wherein
• the waveform acquisition unit associates the acquired waveform with each of the plurality of driving timings, detects a plurality of peaks of a waveform that appear in temporal vicinity of each of the plurality of driving timings, and calculates a feature amount,
• the feature amount includes a relative amount of the electromotive force at the plurality of peaks, and
• the waveform analyzing unit determines an abnormality based on a change in the feature amount.

A method of determining an abnormality in an analyzing apparatus that measures a concentration of electrolytes in a sample, the analyzing apparatus including,

• a plurality of ion selective electrodes that acquire a potential based on the concentration of electrolytes,
• a reference electrode that acquires a potential based on a reference solution,
• a flow passage through which the sample or the reference solution is supplied to the ion selective electrodes and the reference electrode,
• a plurality of driving units that control the flow passage, aspirate the sample, discharge the sample, aspirate the reference solution, and discharge the reference solution,
• a potential measurement unit that measures electromotive force between a potential acquired by the ion selective electrodes and a potential acquired by the reference electrode,
• a waveform acquisition unit that acquires a waveform representing a change in the electromotive force,
• a waveform analyzing unit that performs analysis using the change in the electromotive force, and
• a driving control unit that outputs a control signal to one or a plurality of the driving units in relation to each of a plurality of driving timings related to a component to be replaced, wherein
• the method includes,
• a step of associating the acquired waveform with each of the plurality of driving timings, detecting a plurality of peaks of a waveform that appear in temporal vicinity of each of the plurality of driving timings, and calculating a feature amount by the waveform acquisition unit,
• the feature amount includes a relative amount of the electromotive force at the plurality of peaks, and
• the method includes a step of determining an abnormality based on a change in the feature amount by the waveform analyzing unit.