▎ 摘　　要

NOVELTY - A hydrogen peroxide detecting method involves adding chitosan-dispersed graphene into a mixed solution containing hydrogen peroxide and indicator 3,3',5,5'-tetramethyl benzidine to obtain mixture, which is subjected to spectral scanning to obtain maximum absorption peak of tetramethyl benzidine oxidation product, followed by fixing the concentrations of graphene and methyl diphenyl amine, changing the concentration of the hydrogen peroxide, measuring a time-absorbance curve to obtain hydrogen peroxide concentration-absorbance linear relationship, and measuring the hydrogen peroxide solution. USE - Method for detecting hydrogen peroxide in water sample. ADVANTAGE - The method enables detecting hydrogen peroxide with high stability and high sensitivity in a simple, rapid and inexpensive manner. DETAILED DESCRIPTION - A hydrogen peroxide detecting method involves adding chitosan-dispersed graphene into a mixed solution containing hydrogen peroxide and indicator 3,3',5,5'-tetramethyl benzidine to obtain mixture. The mixture is subjected to spectral scanning at constant intervals in an ultraviolet spectrograph to obtain maximum absorption peak of tetramethyl benzidine oxidation product at wavelength of 652 nm, followed by fixing the concentrations of graphene and methyl diphenyl amine, changing the concentration of the hydrogen peroxide and measuring a time-absorbance curve at the wavelength of 652 nm to obtain hydrogen peroxide concentration-absorbance linear relationship, and respectively preparing two hydrogen peroxide solutions with different concentrations by utilizing different water samples, and measuring the hydrogen peroxide solution.