[12p-A302-1~18] 8.1 Plasma production and diagnostics

[12p-A302-8] Comments on UV-absorption Spectroscopic Analyses of NO₂^-, HNO₂, O₃ in Plasma Activated Water

〇Kunihide Tachibana¹, Jun-Seok Oh², Yuki Takino³, Akimitsu Hatta³, Toshihiro Nakamura⁴ (1.Kyoto Univ., 2.Osaka City Univ., 3.Kochi Univ. Technol., 4.Kyoto Univ. ILAS)

Keywords:plasma activated water, UV absorption spectroscopy, RONS

For the quantitative analyses of HNO₂, NO₂^-, and O₃, which are major compositions of plasma activated water (PAW), we measured their reference spectra and the absorption coefficients in UV ranges. A new method using the reaction of O₃ with NO₂^- was proposed and tested for calibrating the absorption coefficient of O₃. We investigated also aqueous reactions of O₃ with NO₂^- and HNO₂ to produce NO₃^- for estimating their influences to the PAW compositions.