Electrolyte concentration measuring apparatus and measuring method using same
First Claim
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1. An electrolyte concentration measuring apparatus comprising:
- a plurality of ion selective electrodes and one reference electrode;
a sample introduction unit that introduces a sample solution into the plurality of ion selective electrodes and the reference electrode;
a potential measuring unit that measures a voltage between the plurality of ion selective electrodes and the reference electrode; and
a resistance measuring unit that measures a direct-current resistance of the plurality of ion selective electrodes, wherein the resistance measuring unit measures the direct-current resistance using two of the plurality of ion selective electrodes,and wherein the resistance measuring unit corrects the direct-current resistance using an electromotive force of the ion selective electrodes themselves.
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Abstract
An electrolyte concentration measuring apparatus is provided with: a plurality of ion selective electrodes and one reference electrode; a sample introduction unit that introduces a sample solution to the plurality of ion selective electrodes and the reference electrode; a potential measuring unit that measures a voltage between the plurality of ion selective electrodes and the reference electrode; and a resistance measuring unit that measures a direct-current resistance of the plurality of ion selective electrodes.
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Citations
13 Claims
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1. An electrolyte concentration measuring apparatus comprising:
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a plurality of ion selective electrodes and one reference electrode; a sample introduction unit that introduces a sample solution into the plurality of ion selective electrodes and the reference electrode; a potential measuring unit that measures a voltage between the plurality of ion selective electrodes and the reference electrode; and a resistance measuring unit that measures a direct-current resistance of the plurality of ion selective electrodes, wherein the resistance measuring unit measures the direct-current resistance using two of the plurality of ion selective electrodes, and wherein the resistance measuring unit corrects the direct-current resistance using an electromotive force of the ion selective electrodes themselves. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of measuring a direct-current resistance of a plurality of ion selective electrodes in an electrolyte concentration measuring apparatus provided with the plurality of ion selective electrodes and one reference electrode, the method comprising:
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measuring an electromotive force between at least one of the plurality of ion selective electrodes and the reference electrode; measuring a voltage and a current between the at least one of the plurality of ion selective electrodes and the reference electrode; and determining the direct-current resistance from the electromotive force, the voltage, and the current.
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13. A method of measuring a direct-current resistance of a plurality of ion selective electrodes in an electrolyte concentration measuring apparatus provided with the plurality of ion selective electrodes and one reference electrode, the method comprising:
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measuring an electromotive force between at least one of the plurality of ion selective electrodes and the reference electrode; measuring a voltage and a current between two of the plurality of ion selective electrodes; and determining a sum of resistance values of the two ion selective electrodes from the electromotive force, the voltage, and the current as the direct-current resistance.
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Specification