Portable Electrochemical Water Sensor for Field Concentration Analysis
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Solution Overview
Problem
Current methods for measuring the concentration of electrochemically active substances in water are hindered by the need for laboratory analysis, which is time-consuming and costly, and existing portable systems lack accuracy and reliability, often providing only qualitative results.
Innovation Solution
A portable system comprising a syringe for collecting water samples, a microfluidic cartridge with electrochemical sensors, and a reader for data processing, allowing for real-time analysis of electrochemically active substances in water by mixing the sample with a saline solution and converting analog signals to digital for processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If laboratory analysis is used to measure the concentration of electrochemically active substances in water, then measurement precision is improved, but loss of time increases significantly
Solution Approach 1:
The invention extracts the core measurement function from the complex laboratory environment and places it in a portable field device. The electrochemical sensor and measurement electronics are removed from the laboratory setting, enabling concentration measurements to be performed directly at the water source, thus eliminating transport and waiting time while maintaining measurement accuracy through specialized electrochemical techniques.
Solution Approach 2:
The invention creates a simplified copy of the laboratory measurement capability in a portable format. Instead of transporting samples to a full laboratory, a compact device replicates the essential electrochemical measurement functions using miniaturized sensors and electronics, providing laboratory-quality concentration measurements in the field within minutes.
2Measurement precision
If mass spectrometers are used for analysis, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The invention replaces complex mechanical mass spectrometry systems with electrochemical measurement techniques. Instead of using heavy mechanical components and complex vacuum systems, the device uses electrochemical sensors that measure concentration through electrochemical reactions, achieving comparable precision with dramatically reduced complexity and portability.
Solution Approach 2:
The invention changes the measurement parameter from mass-to-charge ratio detection in mass spectrometry to electrochemical signal detection. By measuring electrical current or potential changes resulting from electrochemical reactions at the sensor surface, the system achieves high sensitivity and accuracy without requiring the complex infrastructure of mass spectrometry.
3Loss of time
If portable analysis systems are used, then loss of time is reduced, but measurement precision deteriorates
Solution Approach 1:
The invention performs preliminary preparation of the measurement system in the field, including sample collection in portable containers and immediate analysis setup. By having all necessary components (sensors, reagents, electronics) pre-assembled in portable units, the system eliminates sample transport time while maintaining measurement precision through controlled electrochemical measurement conditions.
Solution Approach 2:
The invention introduces electrochemical sensors as intermediaries between the water sample and the measurement system. These sensors directly interact with the electrochemically active substances in the water, converting chemical concentration information into electrical signals that can be processed immediately, thus achieving both rapid field measurement and accurate quantification without sample transport.
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 rapid, accurate, and cost-effective quantification of electrochemically active substances in water, reducing the need for laboratory analysis and providing immediate results, thus enhancing response times to environmental hazards.
Implementation Method 1
measuring the concentration of electrochemically active substances in water with electrochemical techniques
Data Source
Figure 1~2B
Figure 3~4
Figure 5~6
AI summary
A portable system for measuring the concentration of electrochemically active substances in water with electrochemical techniques comprises: - a device (10,13) for collecting a sample (C) of water to be analyzed, - a device (10,14) adapted to mix the collected water sample (C) with a saline solution (B), - a measuring cartridge (20) for analyzing the sample and saline solution mixture, wherein said cartridge is provided with at least one sensor (24), - a reader (30) adapted to read the data produced by the sensor (24) of said measuring cartridge (20), and - a data processing unit provided with a user interface for communication with an operator and a network interface for communication with a remote server or other type of remote apparatus acting as a user of the information, wherein said data processing unit converts the data from the analog form in which they are produced by the sensor (24) of the cartridge (20) into a digital format suitable for being further processed.