STERILIZATION TREATMENT METHOD, FORMULATION FOR STERILIZATION USE, SOLID ICE FOR STERILIZATION USE, METHOD AND DEVICE FOR PRODUCING THE SOLID ICE, AND METHOD FOR PRODUCING LIQUID FOR STERILIZATION USE
A sterilization treatment method includes producing a plasma-treated solution in which biocidal activity is held by diffusing, in a liquid, superoxide anion radicals (O2−.) or a precursor of the superoxide anion radicals (O2−.) by plasma generated in a vicinity of or in a manner to make contact with the liquid； freezing the plasma-treated solution to produce solid ice and store the solid ice in a frozen state； thawing the solid ice to the plasma-treated solution in which biocidal activity by the superoxide anion radicals (O2−.) or the precursor of the superoxide anion radicals (O2−.) is held； and applying a sterilization treatment by any one of the following: allowing the plasma-treated solution to have a pH value of 4.8 or lower to apply the resultant plasma-treated solution to an object, and applying the plasma-treated solution to an object of which a pH value is 4.8 or lower.
