Electrochemical Sensor Bubble Interference Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electrical sensors, particularly electrochemical sensors, face interference from bubbles that form due to device topography, surface tension, and hydrophilicity-hydrophobicity differences, leading to reduced measurement accuracy and potential sensor failure, especially in miniaturized systems with complex microfluidic channels.
Innovation Solution
A method and system that determine a first property related to the presence of bubbles on or adjacent the sensor surface, using techniques like electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) to identify the reduction potential or concentration of dissolved gases, allowing for targeted bubble removal through electrochemical reduction or other means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sensor assemblies are miniaturized to improve performance and efficiency, then measurement speed and compactness are improved, but bubble formation increases and interference is amplified
Solution Approach 1:
The system performs preliminary detection of bubbles using electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) before they interfere with measurements. By detecting bubbles in advance and removing them proactively, the system prevents measurement interference while maintaining miniaturized sensor design, thus resolving the contradiction between compactness and bubble interference.
Solution Approach 2:
The system implements a feedback mechanism where EIS and CV measurements continuously monitor for bubble presence, and when bubbles are detected, removal actions are automatically triggered. This closed-loop control enables the miniaturized sensor to actively manage bubble interference, maintaining measurement accuracy despite the increased bubble formation tendency in compact designs.
2Measurement precision
If bubbles are removed from the sensing assembly, then measurement accuracy is improved, but system complexity and operational disruption may increase
Solution Approach 1:
The system uses the existing sensing electrodes to perform multiple functions: both primary measurements and bubble detection via EIS and CV. By making the electrodes multi-functional, the system achieves bubble removal capability without adding separate detection devices, thus improving measurement accuracy while minimizing increases in system complexity.
Solution Approach 2:
The sensing assembly uses its own electrodes and electrical circuits to detect and remove bubbles, rather than requiring entirely separate removal mechanisms. This self-service approach allows the system to maintain measurement accuracy through bubble removal while avoiding the complexity of external bubble management systems.
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 approach effectively reduces bubble interference, improving sensor accuracy and reliability by clearing the sensing surface and fluid flow pathways, reducing downtime, and enhancing measurement efficiency without disrupting the sample or increasing sensor complexity.
Implementation Method 1
using techniques like electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) to identify the reduction potential or concentration of dissolved gases
Implementation Method 2
using techniques like electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) to identify the reduction potential or concentration of dissolved gases
Implementation Method 3
allowing for targeted bubble removal through electrochemical reduction or other means
Data Source
AI summary
The present disclosure provides methods and systems for reducing interference by one or more bubbles in a sensing assembly by determining a first property of the solution and using the first property in a removal step.