Laser-induced emission spectral analysis (LIESA) developed by Krupp as an in-stream elemental analysis method with broad applications has been investigated towards its applicabilities and limits for the quality control of final mixes of technical rubber goods for the automotive industry (RELMA, remote laser microanalysis). In particular the correlation of RELMA data with physical parameters was of great interest. It could be demonstrated that beside detection of mistakes in weighing and detection of mixing inhomogeneities, the identification of particles and the control of incoming raw material are attractive RELMA potentials in the chemical laboratory. Except for rheovulcametry a number of physical tests can be omitted. In contrast to the tyre factory, on-line monitoring of mixes for technical rubber goods is not possible due to great matrix variety and frequent recipe changes.