Physicochemical Methods of Studying Hydrogen Peroxide for Biomedical Applications.

The role of hydrogen peroxide molecule (Н₂О₂) in the vital functions of biological objects has been considered. The mechanisms of Н₂О₂ formation and its relationship with redox reactions, as well as some possible methods of analyzing the Н₂О₂ content in liquid and gaseous media, are discussed. In particular, the possibility of using highly sensitive methods of laser spectral analysis for detecting Н₂О₂ traces in exhaled air, which are promising for diagnostics of various pathologies, is considered. The absorption spectra of exhaled air are analyzed, and the strongest H₂O₂ spectral lines (isolated from the influence of other gaseous metabolites), applicable for detecting Н₂О₂ by diode laser spectroscopy, are chosen. [ABSTRACT FROM AUTHOR]