Magnetic properties of graphitic compounds are of current interest for both theoretical and experimental research in the fields of condensed matter physics and magnetism. In the last year the assessment of various chemical methods for the bulk production of graphene, probably the most fascinating material in this family of compounds, has allowed its first µsr characterization: in particular we could perform preliminary measurements which highlighted the presence of free muon spin precession. In this proposed experiment we plan to systematically explore the presence of µsr oscillations in various graphene samples, different for defects concentration and type, in order to identify the origin of local magnetic fields and characterize the magnetic correlations present in graphene.