Development of an Evaluation Method for Hydroxyl Radical Scavenging Activities Using Sequential Injection Analysis...

Area of Science:

• Analytical Chemistry
• Biochemistry

Background:

• Hydroxyl radical (·OH) is a highly reactive oxygen species implicated in oxidative stress.
• Accurate measurement of ·OH scavenging activity is crucial for evaluating antioxidant efficacy.

Purpose of the Study:

• To develop and validate a novel method for assessing hydroxyl radical scavenging activity.
• To automate the process of ·OH scavenging evaluation using sequential injection analysis (SIA).

Main Methods:

• Developed a sequential injection analysis (SIA) system coupled with chemiluminescence (CL) detection.
• Utilized the luminol-chemiluminescence reaction initiated by Fenton-generated ·OH.
• Quantified scavenging activity as the reduction in CL intensity caused by sample antioxidants.

Main Results:

• The SIA-CL system automated Fenton reaction, ·OH scavenging, and CL detection.
• Sample analysis (n=3) was completed within 3.0 minutes.
• Demonstrated good precision with intraday (2.6%) and interday (3.7%) relative standard deviations for L-ascorbic acid.

Conclusions:

• The developed SIA-CL method provides a rapid and automated approach for evaluating ·OH scavenging capacities.
• The system is suitable for assessing the antioxidant potential of various compounds, including pharmaceuticals.