Device for measuring electrolyte concentration
AssigneeHitachi High-Tech Corporation
InventorsAtsushi Kishioka, Masafumi Miyake
Life of this patent
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Abstract
An object of the present invention is to provide a device for measuring electrolyte concentration capable of easily measuring a temperature difference between a sensitive membrane and liquid in the vicinity of the sensitive membrane that affects an electrolyte concentration analysis value. The device for measuring electrolyte concentration according to the present invention measures potential of an ion selective electrode at at least two or more different times while liquid is present in a flow path for introducing the liquid into the ion selective electrode, and calculates a temperature difference between the liquid and the ion selective electrode using the measured potential of the ion selective electrode at two or more different times (see FIG. 4).
Claims17
A device for measuring electrolyte concentration that measures concentration of an ion in liquid using an ion selective electrode, the device comprising:
- a potential measurement unit that measures potential of the ion selective electrode at least two or more different times while the liquid is present in a flow path for introducing the liquid into the ion selective electrode;
- a central processing unit (CPU) configured to:
- calculate the concentration by using potential of the ion selective electrode;
- and
- calculate a temperature difference between the liquid and the ion selective electrode using potential of the ion selective electrode at two or more different times measured by the potential measurement unit;
- and
- a temperature controller configured to control at least one of temperature of the liquid or temperature of the ion selective electrode based on the calculated temperature difference to improve measurement accuracy.
A device for measuring electrolyte concentration that measures concentration of an ion in liquid using an ion selective electrode, the device comprising:
- a potential measurement unit that measures potential of the ion selective electrode at least two or more different times while the liquid is present in a flow path for introducing the liquid into the ion selective electrode;
- a central processing unit (CPU) configured to:
- calculate the concentration by using potential of the ion selective electrode;
- calculate a temperature difference between the liquid and the ion selective electrode using potential of the ion selective electrode at two or more different times measured by the potential measurement unit, and
- correct subsequent concentration measurements using the calculated temperature difference.
Dependencies are inferred from the claim text.