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Updated: Jul 3, 2026

Using Cyclic Voltammetry, UV-Vis-NIR, and EPR Spectroelectrochemistry to Analyze Organic Compounds
Published on: October 18, 2018
Free radical processes in green tea polyphenols (GTP) investigated by electron paramagnetic resonance (EPR)
K F Pirker1, J Ferreira Severino, T G Reichenauer
1Department of Environmental Research, Austrian Research Centers GmbH - ARC, 2444 Seibersdorf, Austria. katharina.pirker@arcs.ac.at
Abstract:
This chapter reviews the current status of research on investigations of the free radical chemistry of green tea and its constituent polyphenols (GTP). It is based on the use of electron paramagnetic resonance (EPR) spectroscopy, and also includes a section on practical aspects of the technique, which should be of value to readers who are unfamiliar with the detailed operation of EPR. The free radical chemistry of GTP is important, because many of their antioxidant functions involve reactions with O(2)-derived free radicals, and the products of such reactions are themselves generally free radicals. The stability of these products and their abilities to participate in subsequent reactions may have considerable bearing on their biological function. These are also discussed briefly along with the authors' views of future investigations which would appear to be valuable for this topic.
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