A mixture
of 0.1 U ml-1 HRP and 5 mM of guaiacol in 50 mM KPi buffer was either treated with the DBD
plasma source for 5 min (black), incubated with 0.5 mM H2O2 (red), or left untreated (green).
The spectra were recorded immediately after completion of the reaction. The experiment was
performed three times. Representative spectra are shown.