JP2004117085A5 - - Google Patents

Claims (9)

In an electrochemical measurement apparatus having at least a working electrode and a reference electrode and measuring an electrochemical response to a test solution,
A conductor provided in contact with each electrode;
Electrode measuring means for measuring the capacitance component and the resistance component of each electrode through the conductor,
An electrochemical measurement apparatus comprising: means for predicting a stable value of an electrochemical response at the time of measuring a test liquid, using the capacitance component and resistance component of each electrode measured by the electrode measurement means as correction parameters. The electrochemical measurement apparatus according to claim 1, wherein the electrode measurement unit further measures an inductance component of each electrode through the conductor. In an electrochemical measurement apparatus having at least a working electrode and a reference electrode and measuring an electrochemical response to a test solution,
A conductor provided in contact with each electrode;
Electrode measuring means for measuring the capacitance component and the resistance component of each electrode through the conductor,
A deterioration determining means for determining the degree of deterioration of each electrode from the capacitance component and resistance component of each electrode measured by the electrode measuring means;
An electrochemical measurement apparatus comprising: a cleaning unit that cleans an electrode surface by applying a cleaning current to each electrode through the conductor based on a determination result of the deterioration determination unit. The electrode measuring means, and the alternating current applying means for applying an alternating current to each electrode via the conductor, by switching the output of the alternating current, further an alternating current output switching means for generating the cleaning current The electrochemical measuring device according to claim 3, wherein the electrochemical measuring device is provided. In an electrochemical measurement apparatus having at least a working electrode and a reference electrode and measuring an electrochemical response to a test solution,
A conductor provided in contact with each electrode;
Counting means for counting at least one use state among the number of use times and the use time in which each electrode is immersed in the test solution,
A deterioration determining means for determining the degree of deterioration of the electrode by comparing the use state and a preset use limit value that can guarantee measurement accuracy when the electrode is continuously used without cleaning ;
An electrochemical measurement apparatus comprising: a cleaning unit that cleans an electrode surface by applying a cleaning current to each electrode through the conductor based on a determination result of the deterioration determination unit. The cleaning means counts the counter by counting the number of times of cleaning, and the number of times of cleaning is compared with a preset number of times of cleaning, which is a preset number of times that the cleaning effect is lost and the sensor needs to be replaced. The electrochemical measurement device according to any one of claims 3 to 5, wherein the sensor replacement is instructed when the used number of times exceeds the limit cleaning number. And a reference electrode and the working electrode, at least one of said working electrode and the reference electrode is comprised of three conductors of one electrode and two insoluble conductor, the three conductors, the test liquid an electrochemical measuring device covered with a catalyst such as a reference solution and a functional film, have a contact portion contacting said catalyst with test liquid to measure the electrochemical response between the two electrodes to a subject liquid for reaction,
A resistance component calculating means for calculating a resistance component between the two insoluble conductors via the catalyst;
A catalyst deterioration determination unit that compares the resistance component calculated by the resistance component calculation unit with a preset catalyst resistance component evaluation range and determines the degree of catalyst deterioration;
An electrochemical measurement apparatus comprising: an informing means for informing a degree of deterioration of the catalyst based on a determination result of the catalyst deterioration determining means. The electrochemical measurement apparatus according to any one of claims 1 to 7, wherein the electrochemical measurement apparatus measures a potential difference generated between the working electrode and a reference electrode. The electrochemical measurement device further includes a counter electrode on the working electrode and the reference electrode, applies a voltage having the reference electrode as a reference potential from the counter electrode to the working electrode, and measures a current value generated between the counter electrode and the working electrode. The electrochemical measuring device according to any one of claims 1 to 7, wherein