Ion Sensor Stabilization via Reference Electrode and Controlled Solution
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Solution Overview
Problem
Conventional ion sensors experience unstable output drifts until a hydrated layer forms at the sensing interface, requiring prolonged stabilization time before accurate ion detection can be achieved.
Innovation Solution
Incorporating a reference electrode and a solution with changeable ion concentration in the sensing area of the ion detection element, allowing the sensing area to be disposed within the solution, which stabilizes the output drift and reduces stabilization time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the ion detection element is used without a reference electrode and controlled ion concentration solution, then the device complexity is reduced, but the output stability and measurement precision deteriorate due to drift until hydrated layer formation
Solution Approach 1:
A reference electrode and a solution with controllable ion concentration are introduced as intermediary elements. The reference electrode provides a stable reference potential, while the solution's ion concentration is controlled to maintain a stable potential difference across the ion detection element, thereby stabilizing the output signal and enabling accurate measurements.
2Object-affected harmful factors
If the sensing area is disposed outside the solution, then the contamination risk is reduced, but the stabilization time increases due to delayed hydrated layer formation
Solution Approach 1:
The sensing area is pre-disposed within the solution before actual ion detection begins. This preliminary positioning allows the hydrated layer to form in advance, so that when ion detection starts, the sensor is already stabilized and ready for accurate measurements, thereby reducing the effective stabilization time.
3Measurement precision
If the sensing area is disposed within the solution, then the measurement precision and response speed are improved, but the contamination risk increases
Solution Approach 1:
The solution itself acts as an intermediary medium that mediates between the sensing area and the external environment. By controlling the ion concentration in this solution, the system achieves stable and accurate ion detection while the solution barrier protects the sensing area from direct contamination by external substances.
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 configuration shortens the time to stabilize the ion sensor output, enhances detection accuracy, and limits contamination and pH fluctuations, thereby improving the reliability and efficiency of ion detection.
Implementation Method 1
a solution whose ion concentration is changeable in a sensing area of the ion detection element
Implementation Method 2
a reference electrode that provides a reference point of a potential
Data Source
AI summary
An ion sensor includes an ion detection element, a reference electrode that provides a reference point of a potential, and a solution in which an ion concentration can be changed in a sensing area of the ion detection element. The sensing area of the ion detection element is disposed in the solution. A method for detecting a target substance employs an ion sensor. The target substance bound to a label having a function of changing the amount of ions detectable by the ion sensor is introduced into the solution, and a change in the amount of ions is detected using the ion sensor.