Disclosed is a method for the colorimetric determination of hydrogen peroxide in a sample by reacting a particular chromogen with the hydrogen peroxide in the presence of peroxidase and measuring the absorbancy of the reaction solution in the visible ray region. Also disclosed is a test composition for...http://www.google.de/patents/US4384042?utm_source=gb-gplus-sharePatent US4384042 - Method and test composition for determination of hydrogen peroxide