Patent ID: 7378282

Claim:
A method for measuring hypochlorite ion which comprises: (A) reacting a compound represented by the following general formula (I) or a salt thereof with hypochlorite ion to generate a dearylated compound, the compound of general formula (I) or salt thereof having high reactivity to hypochlorite ion and substantially no reactivity to singlet oxygen, superoxide anion, hydrogen peroxide or nitric oxide: wherein R 1 represents a 2-carboxyphenyl group which may be substituted; R 2 represents a phenyl group which is substituted with a substituted or unsubstituted amino group; X 1 and X 2 each independently represents hydrogen atom or a halogen atom; and (B) measuring fluorescence of the dearylated compound or a salt thereof to provide measurement of hypochlorite ion even in the presence of any singlet oxygen, superoxide anion, hydrogen peroxide and nitric oxide.