A simple and rapid method for measuring dissolved oxygen in waters with gold microelectrode

Area of Science:

• Analytical Chemistry
• Environmental Science

Background:

• Dissolved oxygen (DO) is crucial for chemical, biological, and biochemical processes.
• Rapid and accurate DO measurement is often required for various applications.

Purpose of the Study:

• To establish a rapid, sensitive, and simple electrochemical method for DO determination.
• To investigate the influencing factors on the proposed method and develop an empirical formula.

Main Methods:

• Development of a first derivative linear sweep voltammetry (FD-LSV) method for DO analysis.
• Investigation of scan rate and microelectrode surface area effects on FD-LSV peak height.
• Application of the FD-LSV method to environmental water samples.

Main Results:

• The FD-LSV method provides rapid and sensitive DO determination.
• An empirical formula was proposed to correlate FD-LSV peak height with influencing factors.
• The FD-LSV method demonstrated higher accuracy and required less time compared to other electrochemical techniques.

Conclusions:

• The developed FD-LSV method is a suitable, efficient, and accurate technique for DO determination.
• The method is effective for analyzing DO levels in various environmental water samples.