Patent ID: 8580515

Claim:
A method for measuring hydrogen peroxide concentration in a solution by using single-walled carbon nanotubes coated with a negative charge group, comprising the steps of: a. providing the single-walled carbon nanotubes coated with the negative charge group to the solution to be detected; b. measuring optical absorption of the solution containing the negative charge group-coated single-walled carbon nanotubes, wherein the optical absorption of the solution containing the negative charge group-coated single-walled carbon nanotubes is correlated with hydrogen peroxide concentration of the solution to be detected; and c. subsequently decomposing any hydrogen peroxide in the solution into H 2 O and O 2 , wherein decomposing any hydrogen peroxide in the solution into H 2 O and O 2 comprises adding catalase or MnO 2 to the solution after measuring optical absorption of the solution containing the negative charge group-coated single-walled carbon nanotubes.