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Updated: Jun 1, 2026

A Protocol for Electrochemical Evaluations and State of Charge Diagnostics of a Symmetric Organic Redox Flow Battery
Published on: February 13, 2017
Rapid and automated analytical methods for redox species based on potentiometric flow injection analysis using
Hiroki Ohura1, Toshihiko Imato
1Department of Applied Chemistry and Biochemistry, Faculty of Engineering, Kyushu Sangyo University, Fukuoka 813-8503, Japan.
This review highlights potentiometric flow injection analysis for detecting redox species using potential buffers. These methods offer sensitive and versatile techniques for various analytical applications.
Area of Science:
- Analytical Chemistry
- Electrochemistry
Background:
- Potentiometric flow injection analysis (FIA) is a versatile technique.
- Redox potential buffers are crucial for stable potentiometric measurements.
Purpose of the Study:
- To review two potentiometric flow injection methods for determining redox species.
- To demonstrate the utility of redox potential buffers in these techniques.
Main Methods:
- Utilizing redox couples (e.g., Fe(III)-Fe(II)) with redox electrodes.
- Employing transient potential changes generated by bromine or chlorine intermediates.
- Applying a cerium(IV)-cerium(III) potential buffer for trace hydrazine determination.
Main Results:
- Demonstrated the effectiveness of potentiometric FIA with various redox buffers.
- Achieved high sensitivity in detecting oxidative species via transient potential changes.
- Successfully determined trace amounts of hydrazine.
Conclusions:
- Potentiometric flow injection analysis with redox potential buffers is a powerful analytical tool.
- The reviewed methods offer sensitive and applicable solutions for redox species determination.
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