Membrane-Covered Peracetic Acid Meter Using Buffer Solution
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Solution Overview
Problem
Existing peracetic acid concentration meters face issues with contamination and reduced sensitivity due to leaks of inter solution, which can affect the accuracy of measurements and pose safety risks, especially in fields like medicine and food production.
Innovation Solution
A membrane-covered peracetic acid concentration meter using a buffer solution as the internal solution that does not react with peracetic acid, combined with an intermediate membrane for improved responsiveness and sensitivity, preventing contamination and toxic gas formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If iodide ions or bromide ions are used in the internal solution to measure peracetic acid concentration, then measurement capability is achieved, but contamination of the sample solution occurs and disinfecting effect is reduced
Solution Approach 1:
The patent introduces an intermediary substance (amperometric sensor with specific electrode reactions) that allows measurement of peracetic acid without direct contact between the internal solution containing iodide/bromide ions and the sample solution. The sensor acts as a mediator that converts chemical information into electrical signals without requiring mixing of solutions.
Solution Approach 2:
The patent replaces the chemical measurement system (direct reaction between iodide/bromide and peracetic acid) with an electrochemical system (amperometric detection). Instead of relying on chemical reactions that cause contamination, the system uses electrical current measurement to detect peracetic acid concentration, eliminating the harmful chemical interaction.
2Loss of time
If the membrane is placed close to the electrode to improve responsiveness, then response time is reduced, but sensitivity decreases due to insufficient inter solution reaching the electrode surface
Solution Approach 1:
The patent introduces a porous membrane as an intermediary structure between the sample solution and the electrode. This membrane allows selective passage of peracetic acid while maintaining close proximity for fast response, and its porous structure ensures adequate internal solution reaches the electrode surface through capillary action, preserving sensitivity.
Solution Approach 2:
The patent employs a porous membrane with specific pore size and structure. The porosity allows rapid diffusion of peracetic acid molecules to the electrode surface (improving response time) while the capillary channels within the porous structure ensure continuous supply of internal solution containing reactants (maintaining sensitivity).
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
Ensures accurate measurement of peracetic acid concentration without affecting the sample solution's disinfecting effect, reduces toxicity risks, and enhances sensor responsiveness without deteriorating sensitivity.
Implementation Method 1
a membrane that allows peracetic acid to permeate
Implementation Method 2
an internal solution that is a buffer solution, having a buffering action on hydrogen ion concentration
Implementation Method 3
electrodes (a working electrode and an counter electrode) that are held in the tubular body; an internal solution
Data Source
AI summary
A main object of the present invention is to provide a membrane covered type peracetic acid concentration meter that can prevent various common problems, including problems that occur in the event of an internal solution leak into a sample solution. The membrane covered type peracetic acid concentration meter adapted to measure the concentration of peracetic acid in the sample solution includes: a membrane that allows peracetic acid to permeate; and the internal solution that dissolves peracetic acid having permeated the membrane. In addition, as the internal solution, a buffer solution having a buffering action on hydrogen ion concentration is used.