Peracetic Acid Concentration Meter with Organic-Blocking Diaphragm
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Solution Overview
Problem
Conventional peracetic acid concentration meters face contamination issues due to organic material permeating through the diaphragm and adhering to the working electrode, leading to inaccurate measurements.
Innovation Solution
A peracetic acid concentration meter equipped with a diaphragm that includes a permeation-inhibiting layer, comprising a semipermeable membrane and a supporting substrate, which prevents organic material from entering the internal solution while allowing peracetic acid to pass, thereby maintaining electrode cleanliness and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a diaphragm is used to allow peracetic acid permeation, then peracetic acid can reach the working electrode for measurement, but organic material also permeates through the diaphragm and contaminates the working electrode
Solution Approach 1:
The diaphragm is segmented into two functional layers: a base diaphragm layer for peracetic acid permeation and a permeation-inhibiting layer for blocking organic materials. This segmentation allows each layer to specialize in one function, enabling selective permeation while preventing contamination.
Solution Approach 2:
The diaphragm uses a composite structure combining a base diaphragm material (for peracetic acid permeability) with a permeation-inhibiting layer (for organic material blocking). This composite approach integrates two contrasting material properties into a single functional component that achieves both measurement accuracy and contamination prevention.
2Reliability
If organic material permeates through the diaphragm and reaches the working electrode, then the electrode surface becomes contaminated and obstructs the peracetic acid reaction
Solution Approach 1:
The permeation-inhibiting layer acts as an intermediary barrier between the test solution and the working electrode. It selectively blocks organic materials while allowing peracetic acid to pass through to the electrode, thus protecting the electrode surface without interfering with the intended chemical reaction.
Solution Approach 2:
The harmful organic materials are extracted or removed from the path to the working electrode by the permeation-inhibiting layer. This layer specifically targets and removes the contaminating substances while leaving the desired peracetic acid molecules unaffected, ensuring clean electrode surface conditions.
3Object-affected harmful factors
If a semipermeable membrane is used as the permeation-inhibiting layer, then organic material permeation is inhibited through molecular weight control, but the membrane strength and compatibility with diaphragm composition must be considered
Solution Approach 1:
The permeation-inhibiting layer is applied locally on the test solution side of the diaphragm, creating a localized functional zone with different properties than the base diaphragm. This local quality change enables selective permeation control without requiring the entire diaphragm structure to have complex properties.
Solution Approach 2:
The combination of base diaphragm material and semipermeable membrane creates a composite structure that leverages the strengths of each material. The base diaphragm provides mechanical support and peracetic acid permeability, while the semipermeable membrane layer provides organic material blocking, together solving multiple requirements simultaneously.
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
The permeation-inhibiting layer effectively inhibits organic material contamination, enhancing the accuracy of peracetic acid concentration measurements by reducing electrode obstruction and maintaining sensor sensitivity over time.
Implementation Method 1
If the permeation-inhibiting layer is provided with a semipermeable membrane, then because it is possible to control the permeation rate by means of the molecular weight, it is possible to inhibit the permeation of organic material without obstructing the permeation of the peracetic acid.
Implementation Method 2
a diaphragm that is permeable to peracetic acid, an internal solution in which peracetic acid that has permeated through the diaphragm is dissolved
Data Source
AI summary
There is provided a peracetic acid concentration meter that inhibits contamination of a working electrode surface by organic material, and makes it possible to measure a peracetic acid concentration more accurately than is possible conventionally. The present invention is a diaphragm-type peracetic acid concentration meter that measures a peracetic acid concentration in a test solution and is characterized in being provided with a diaphragm that is permeable to peracetic acid, an internal solution in which peracetic acid that has permeated through the diaphragm is dissolved, a working electrode and a counter electrode that are immersed in the internal solution, and a permeation-inhibiting layer that is laminated onto a surface of the diaphragm on a side thereof that is in contact with the test solution, and that inhibits permeation of organic material.