Sterilizer, oral cavity sterilizer, sterilization method, sterilization apparatus, and sterilizer evaluation method

A sterilizer evaluation method comprising:

• performing an electron spin resonance (ESR) measurement of a liquid mixture of a sample collected from a sterilization target brought into contact with a sterilizer and 4-hydroxy-2,2,6,6-tetramethylpiperidine N-oxide (TEMPOL), and
• evaluating a sterilization effect of the sterilizer by performing a measurement of catalase activity of cells or microorganisms contained in the sample based on a line width of an obtained electron spin resonance (ESR) spectrum,
• wherein the sterilizer comprises:
• (i) hydrogen peroxide, and (ii) a catalase activity inhibitor comprising scutellaria or green tea, as initial reagents, which is configured to be brought into contact with a sterilization target and then irradiated with light having a wavelength in a range of from 350 nm to 500 nm.