Element contents of dried plant samples allow conclusions to be drawn about the soil and make it possible to find out how and in which compartment the plant accumulates heavy metals, for example. We analyse alkali and alkaline earth contents as well as specific trace element concentrations (e.g. As, Se, Cd, PGEs). In addition, the specific isotopic signature of carbon δ13C and nitrogen δ15N can be investigated. Thus, the origin and composition of plant material at one site can be reconstructed and compared with other sites.