In this study, we demonstrate that ToF-SIMS along with multivariate analysis is capable to separate three different reference clay nano composites from each other. The resulting model can be used to successfully group ToF-SIMS surface spectra from nano clay-containing composite polymer plates into the right nano clay groups. This method could ultimately be used to identify nano clay-containing polymer composites, which are used for food contact materials and for the preliminary identification of the nano clay material used in various food packaging materials. This could be a further step to a better understanding of the chemical behavior of these new polymer additives and their use in food contact materials.