Reduced Glutathione Electroreduction via pH Control
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Solution Overview
Problem
Conventional methods for producing reduced glutathione by electroreduction of oxidized glutathione face inefficiencies due to high costs, corrosion issues, and decomposition under strong acidity, requiring large facilities and expensive electrodes.
Innovation Solution
A method using an aqueous oxidized glutathione solution with a pH of 2.0-3.0 and a neutral salt conducting agent, such as sodium sulfate, to enhance conductivity without strong acidity, allowing for efficient electroreduction and crystalization of reduced glutathione, while using economical electrodes and smaller facilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If strong acid is used to acidify the cathode side electrolytic cell to enable electroreduction, then the electroreduction reaction can proceed, but the reduced glutathione decomposes and the cathode corrodes
Solution Approach 1:
The patent changes the pH parameter from strong acid (pH 0.6-1.0) to weak acid (pH 2.0-3.0) conditions, and introduces a buffer system to maintain stable pH during electroreduction. This parameter change allows the electroreduction reaction to proceed while preventing decomposition of reduced glutathione and cathode corrosion
Solution Approach 2:
The patent introduces a buffer substance as an intermediary to control the pH environment. The buffer system mediates between the need for acidic conditions to enable electroreduction and the need for neutral conditions to stabilize reduced glutathione, creating an optimal intermediate pH range
2Reliability
If electric current density is lowered to minimize decomposition of reduced glutathione, then stability improves, but reduction efficiency per electrode area decreases
Solution Approach 1:
The patent optimizes multiple parameters simultaneously: pH (2.0-3.0), buffer concentration, electric current density, and electrode material. By changing the pH parameter and introducing buffering capacity, the system can operate at moderate current densities without excessive decomposition, maintaining both efficiency and stability
Solution Approach 2:
The patent employs composite electrode materials that combine corrosion resistance with good electroreduction performance. The electrode structure is designed to resist corrosion at weak acid pH while maintaining high catalytic activity for glutathione reduction, allowing high current densities without sacrificing stability
3Productivity
If electrode area is increased to achieve industrial scale production, then production capacity improves, but facility size and cost increase
Solution Approach 1:
The patent optimizes the concentration of oxidized glutathione in the electrolyte solution and adjusts pH and buffer conditions to maximize current efficiency. By improving the quality of electrical current utilization through parameter optimization, the patent achieves high production capacity without proportionally increasing electrode area
Solution Approach 2:
The patent employs inexpensive electrode materials that are resistant to corrosion under weak acid conditions. Using cost-effective materials like stainless steel or coated electrodes instead of expensive platinum or gold enables industrial-scale production without excessive facility cost
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 efficient production of reduced glutathione on an industrial scale by reducing electrode and membrane sizes, minimizing corrosion and decomposition, and lowering production costs.
Implementation Method 1
a solution in the cathode cell comprises an aqueous oxidized glutathione solution with pH 2.0 - 3.0 comprising a conducting agent other than acid
Implementation Method 2
a process for producing reduced glutathione by electroreduction of oxidized glutathione
Data Source
Figure 1A~1B
Figure 2
AI summary
Provided is a superior method of producing reduced glutathione by electroreduction of oxidized glutathione. In a method of producing reduced glutathione by electroreduction of oxidized glutathione using a cathode cell and an anode cell separated from each other by a separating membrane, oxidized glutathione is produced using an aqueous oxidized glutathione solution with pH 2.0 - 3.0 comprising a conducting agent other than acid as a solution in the cathode cell.