Disposable Cyclic Voltammetry Sensor for Pretreatment-Free Analysis
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Solution Overview
Problem
Electrochemical sensors require electrode regeneration through physical polishing and sample pretreatment due to contamination by organic matter and radicals, which complicates the measurement process.
Innovation Solution
A sensor system that measures cyclic voltammograms without the need for electrode regeneration or sample pretreatment, using a detachable configuration with a substrate and electrodes, and an analysis device that creates an index curve based on current-potential characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If electrochemical sensors are used for on-site measurement, then portability and compactness are improved, but electrode regeneration through physical polishing and sample pretreatment are required due to contamination
Solution Approach 1:
The patent employs disposable working electrodes that are discarded after a single use. Each working electrode is pre-packaged in a sterile state and disposed of after one measurement, eliminating the need for regeneration, polishing, or complex sample pretreatment procedures. This disposable approach resolves the contradiction by maintaining portability while significantly simplifying operation.
2Measurement precision
If electrode regeneration through physical polishing is performed, then measurement precision is maintained, but measurement time and productivity are reduced
Solution Approach 1:
The working electrodes are pre-prepared and pre-packaged in a sterile state before use, with optimal surface characteristics already established during manufacturing. This preliminary preparation eliminates the need for post-use regeneration or polishing procedures, allowing measurements to be performed immediately without time-consuming surface restoration steps, thereby maintaining both precision and productivity.
3Measurement precision
If sample pretreatment and pH adjustment using buffer solutions are performed, then detection accuracy of specific chemicals is improved, but device complexity and ease of operation are worsened
Solution Approach 1:
The disposable working electrodes are designed to be self-contained units that perform measurements directly in the sample without requiring external buffer solutions or pH adjustment procedures. The electrode itself handles the detection function autonomously, eliminating the need for separate pretreatment steps and reducing system complexity while maintaining detection accuracy through proper electrode design and selection.
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
Enables accurate analyte identification without electrode regeneration or sample pretreatment, simplifying the measurement process and improving portability and usability.
Implementation Method 1
a working electrode, provided on one surface of the substrate, electrically connected to one end of the first wiring, and configured to exchange electrons with the analyte
Data Source
AI summary
A sensor 11 is used for measuring the cyclic voltammogram of a liquid analyte, detachably provided to a measurement device that measures the cyclic voltammogram, and configured to be discarded after each measurement of the cyclic voltammogram, and the sensor includes a substrate 111 having a flat plate shape, a working electrode 112, a counter electrode 113, a reference electrode 114, and wirings 115 to 117. The wirings 115 to 117 are provided on one surface of the substrate 111. The working electrode 112 is provided on one surface of the substrate 111 and electrically connected to one end of the wiring 115. The counter electrode 113 is provided on one surface of the substrate 111 and electrically connected to one end of the wiring 116. The reference electrode 114 is provided on one surface of the substrate 111 and electrically connected to one end of the wiring 117. The working electrode 112 has a circular or square planar shape.