(a)
(b)
Figure 6: (a) Typical Q-MS spectrum shows that the volatile small molecules of CO, CO2, and H2O were formed in the O--induced inactivation processes (O-: 250 nA/cm2). (b) The intensity changes of H2O, CO, and CO2 with different O- intensity. Sample: E. coli, : , exposure size: 1.8 cm2.