Pressurized Reference Electrode Porous Diaphragm Gas Introduction
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Solution Overview
Problem
Existing methods for pressurizing reference electrodes in electrochemical measuring cells are costly and require complex apparatus, making them inefficient for widespread use.
Innovation Solution
A process that generates overpressure in a closed reference electrode chamber by introducing a gas or liquid through a porous diaphragm, eliminating the need for additional feed lines and expensive components like Pt capillaries, allowing for simultaneous pressurization of multiple electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional pressure transducer methods are used to pressurize reference electrodes, then overpressure is achieved to prevent contamination, but the device complexity and cost increase significantly
Solution Approach 1:
The patent extracts the pressurization function from the complex pressure transducer apparatus and implements it through a simple gas introduction system using the existing porous diaphragm. The gas (inert or reactive) is introduced through a simple feed line into the reference chamber, creating overpressure without requiring complex mechanical pressure transmission components. This eliminates expensive Pt capillaries and complex sealing mechanisms while maintaining the contamination protection function.
Solution Approach 2:
The porous diaphragm serves multiple functions: it acts as both the liquid junction for ionic contact between reference electrolyte and measuring medium, and as the pathway for gas introduction to generate overpressure. This multi-functionality eliminates the need for separate pressurization feeds and complex sealing arrangements, simplifying the overall device structure while maintaining reliability.
2Reliability
If pressure transducer methods are used, then overpressure is maintained, but manufacturing costs increase due to expensive components
Solution Approach 1:
The patent replaces expensive, durable components (Pt capillaries, complex pressure transducers) with simpler, cheaper alternatives (gas feed lines, inert gas reservoirs). The gas introduction system uses inexpensive materials and can be easily manufactured, significantly reducing production costs while maintaining the overpressure function necessary for contamination protection.
Solution Approach 2:
The patent changes the physical state and composition parameters of the pressurization medium from liquid electrolyte (requiring complex pressure transmission) to gas phase (allowing simple introduction and pressure equalization). This parameter change enables the use of simpler, cheaper components while maintaining the necessary overpressure conditions for reliable operation.
3Ease of repair
If the reference electrolyte is thickened to reduce maintenance, then electrolyte replenishment is eliminated, but the ability to maintain overpressure and flow out efficiency is reduced
Solution Approach 1:
The patent uses pneumatic pressure (inert gas) to maintain overpressure in the reference chamber, independent of the electrolyte viscosity. The gas pressure directly counteracts the measuring medium pressure and drives electrolyte flow through the porous diaphragm, ensuring that even thickened electrolyte can be effectively pumped out to clean the liquid junction and maintain contamination-free operation.
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
This method achieves high overpressures efficiently, providing effective protection against process pressures while reducing costs and simplifying the production process, enabling the use of inexpensive and robust pressurized reference electrodes.
Implementation Method 1
introducing a gas or liquid penetrating through a porous electrode diaphragm into the reference chamber
Implementation Method 2
the circuit is completed by convectively transported ions and diffusion voltages at the diaphragm
Implementation Method 3
the circuit is completed by convectively transported ions and diffusion voltages at the diaphragm
Data Source
AI summary
The present application relates to a pressurized reference electrode and to a process for its production, said reference electrode comprising a chamber (11) which has a flowable reference electrolyte, and a portion of the wall of said chamber being formed from porous material (10) for contacting said reference electrode with a measuring medium, and said chamber being under overpressure, which is characterized in that the overpressure is generated in said reference electrode by introducing a gas or/and a liquid through said porous material of the wall in said chamber, or introducing said reference electrolyte into said chamber and closing said chamber under pressure.