This article deals with the emission-spectroscopic analysis of low-intensity plasmas as well as on Raman measurements. The investigations were carried out in a direct-recording single-beam method, for which purpose the JENA-made GDM 1000 Grating Double Monochromator was employed. Results obtained are to demonstrate the various applicabilities of the GDM 1000 and to bring about experiences for practical spectroscopic work.