Modification of the Standard Method for Determination of Hydrogen Peroxide in Foods

Abstract

The standard method for the determination of hydrogen peroxide by iodometry is not sufficiently sensitive, because the end point of titration is not clear. In this work, a clear test solution was obtained by modification of the extraction procedure as follows. Hydrogen peroxide was extracted by homogenizing foods with zinc sulfate solution and sodium hydroxide solution. The homogenate was centrifuged and the supernatant was filtered. Hydrogen peroxide in the filtrate was determined by iodometry. This modified method is simple and shows improved sensitivity.