Patent ID: 8420326

Claim:
A method of evaluating performance of an activation gas containing both positive and negative ions in deactivating an antigenic substance floating in the air by measuring binding activity of a processed antigenic substance with an antibody, comprising the steps of: causing the antigenic substance floating in the air and said activation gas to react with each other, to obtain a processed antigenic substance; causing an antibody against said antigenic substance to react with said processed antigenic substance, by intradermal test or conjectival test or intradermal test and conjectival test on an animal other than a human having a cell producing said antibody against said antigenic substance, to measure binding activity of said processed antigenic substance with said antibody; and comparing the measured binding activity of the processed antigenic substance with the binding activity of the same amount of unprocessed antigenic substance, wherein reduced binding activity in the processed antigenic substance is indicative of an effect of said activation gas deactivating the antigenic substance.