ERASER ERASING CAPABILITY DECIDING METHOD

摘要

PROBLEM TO BE SOLVED: To decide whether an eraser has an erasing capability with respect to 1O2 by deciding whether the eraser has the erasing capability for erasing 1O2, based on the relation between the concentration of 1O2 obtained in the first step and the dilution ratio of the eraser and the relation between the concentration of 1O2 obtained in the second step and the dilution ratio of the eraser. SOLUTION: The concentrations of OCI and H2O2 contained in a second mixed solution prepared in the second step are inverted to the concentrations in a first mixed solution prepared in the first step before OCI and H2O2 are reacted with each other. If an eraser has an erasing capability with respect to only 1O2 within OCI, H2O2 and 1O2 when the first and second mixed solutions are prepared, the quantities of 1O2 in the first and second mixed solutions become equal. However the eraser has the erasing capability against OCI or H2O2, the quantities of 1O2 in the first and second mixed solutions differ from each other. The relation between the concentrations of 1O2 obtained in the first and second steps is changed according to whether the eraser has the erasing capability with respect to 1O2 or not.