Ion Selective Electrode Temperature Compensation for Electrolyte Analysis
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Solution Overview
Problem
Existing electrolyte measurement devices face challenges in accurately measuring temperature differences between an ion selective electrode and the liquid being analyzed, particularly in environments where temperature stability is not guaranteed, leading to inaccurate analysis results due to indirect temperature measurement methods and electrical noise interference.
Innovation Solution
The device measures potential at the ion selective electrode at multiple times during liquid flow, calculating the temperature difference between the electrode and the liquid using the measured potentials to correct analysis values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a temperature sensor is attached to a housing wall surface or flow path instead of directly to the ion sensitive membrane, then the device complexity is reduced, but the measurement precision of temperature difference deteriorates
Solution Approach 1:
The patent extracts the temperature measurement function from separate temperature sensors and integrates it into the ion selective electrode itself. The electrode structure is modified to include temperature sensing capability directly at the sensitive membrane location, separating the temperature measurement function from the housing wall or flow path sensors used in conventional devices.
Solution Approach 2:
The patent combines the temperature sensing function with the ion selective electrode by integrating a temperature sensor directly onto the electrode structure at the sensitive membrane location. This merging allows simultaneous measurement of both ion concentration and temperature at the same location, eliminating the need for separate temperature sensors in the housing or flow path.
2Temperature
If a temperature sensor is attached in the flow path, then temperature measurement is possible, but electrical noise from the temperature sensor affects potential measurement, limiting installation position
Solution Approach 1:
The patent uses the ion selective electrode structure itself as an intermediary platform to host the temperature sensor. By placing the temperature sensor on the electrode body at the sensitive membrane location, the electrode acts as a mediator that enables temperature measurement without requiring separate flow path sensors that would introduce electrical noise into the potential measurement circuit.
3Productivity
If a temperature sensor is used in high throughput electrolyte analysis where liquid is replaced in several seconds, then temperature monitoring is possible, but the heat capacity of the temperature sensor itself prevents accurate following of liquid temperature changes
Solution Approach 1:
The patent applies local quality by placing the temperature sensor directly at the sensitive membrane location where liquid temperature is most critical. This localized positioning allows the sensor to measure the actual temperature at the measurement interface without being influenced by the thermal mass of flow path components, enabling accurate temperature tracking even during rapid liquid replacement in high throughput operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method allows for precise temperature difference measurement without additional sensors, enhancing analysis reliability by correcting for temperature fluctuations and improving measurement accuracy.
Implementation Method 1
measures electrolyte concentration based on voltage (potential difference) between the test liquid and the membrane electrode
Implementation Method 2
a sensor that measures a temperature of the electrode block, of the sample temperature control block, and of outside air
Data Source
AI summary
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).