Gas Sampling Bag With Solid Water Absorption Layer for pH Measurement
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Solution Overview
Problem
Conventional pH measurement devices and test strips are unable to continuously monitor pH values in gas samples, especially in environments where pH values fluctuate, and require the gas sample to be introduced into an aqueous solution for measurement, making them impractical for real-time monitoring.
Innovation Solution
A gas sampling bag with an electrochemical test strip that includes a solid water absorption layer, allowing direct absorption of water vapor from gas samples, enabling continuous pH monitoring without the need for liquid addition, and using a working electrode and reference electrode to measure pH values based on potential differences generated by interacting water-soluble substances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pH measuring devices are used to measure gas pH, then pH measurement can be performed, but continuous pH monitoring cannot be achieved and the method is complex to implement
Solution Approach 1:
The invention changes the physical state of the water absorption medium from liquid to solid form. The solid water absorption layer is disposed in the detection area and covers the pH sensing layer, enabling it to directly absorb water from gas samples without requiring liquid introduction or complex gas-liquid mixing apparatus
Solution Approach 2:
The invention extracts the water absorption function from the conventional liquid solution system and integrates it directly into the test strip through a solid water absorption layer. This eliminates the need for separate liquid introduction steps and gas-liquid mixing equipment, simplifying the overall system while enabling continuous monitoring
2Reliability
If gas sample is introduced into aqueous solution for pH measurement, then conventional pH devices can measure the pH, but the measurement only represents the moment of sampling and cannot achieve continuous monitoring
Solution Approach 1:
The solid water absorption layer continuously absorbs water from the gas sample and releases it to the pH sensing layer in real-time, enabling continuous pH monitoring. The layer dynamically responds to changing gas composition, maintaining continuous measurement capability without time delays associated with batch sampling and manual analysis
3Ease of operation
If liquid water is added to the detection area to enable electrode connection, then electrical connection is achieved, but the complexity of liquid addition and handling increases
Solution Approach 1:
The invention changes the physical state of water from liquid to solid in the absorption layer. This solid water absorption layer automatically provides the necessary moisture for electrode connection when gas flows through, eliminating the need for manual liquid addition and handling while ensuring reliable electrical connection between electrodes
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 continuous, real-time pH monitoring of gas samples without the need for liquid introduction, allowing for accurate and dynamic measurement of pH values in varying environments, as demonstrated by experimental results showing effective detection of pH changes in gas samples and application in detecting Helicobacter pylori infections.
Implementation Method 1
The solid water absorption layer is adapted to absorb or adsorb water in the gas sample
Implementation Method 2
The solid water absorption layer is adapted to absorb or adsorb water in the gas sample
Implementation Method 3
After the water-soluble substances interact with the pH sensing layer, a potential difference can be generated between the working electrode and the reference electrode, based on which the pH value of the gas sample can be measured
Data Source
AI summary
A gas sampling bag for gas pH measurement includes a main sampling chamber and an electrochemical test strip accommodating chamber for accommodating an electrochemical test strip. The electrochemical test strip includes a strip body, a working electrode, a pH sensing layer, a reference electrode and a solid water absorption layer. The working electrode has a first part located in a detection area of the strip body. The pH sensing layer is formed on the first part. The reference electrode has a second part located in the detection area. The solid water absorbing layer is formed on the detection area and covers the pH sensing layer and the second part. The solid water absorbing layer is used for absorbing or adsorbing water in the gas sample to form an electrical connection between the first and second parts.