The success of leaching procedures is characterized by the efficiency of the process. This factor involves the amount of dissolved element, which needs to be extracted. The duration required to achieve the desired results is also of particular importance. In order to improve these two factors, auxiliary agents such as hydrogen peroxide are added to the leaching media. These chemicals increase the output and reduce the process time. Therefore, it is of interest to minimize loss of H2O2 through self-decomposition into water and oxygen. The concentration and nature of the metal ions in the solution significantly affect this reaction. Hence, this thesis examines the decomposition behavior of stabilized hydrogen peroxide in sulfuric, ion-containing solution by means of titration. A particular focus lies on determining the influence of Co-, Cu-, Ni-, and Li-ions, as well as of the pH and the initial hydrogen peroxide concentration. Essentially, the results of the investigations correspond to the findings of the literature research. As the ion content increases, the decomposition tends to rise, with cobalt showing the strongest effect after copper. The impact of lithium and nickel on the reaction is relatively small. A low pH also has a positive effect on the remaining hydrogen peroxide content. The outcome of these fundamental research activities provide valuable contribution to the understanding of the involved mechanisms and the optimization possibilities in the area of semi-direct recycling of hard metals and the wet chemical processing of used lithiumion batteries. Future studies with an exact replication of the process parameters are required to improve the individual processes.