We present a model grid of NLTE accretion-disc spectra for different primary masses and mass-accretion rates. We varied the chemical abundances of carbon, nitrogen, oxygen, and silicon to test for over- or underabundances compared to solar values. As the accretion disc represents the chemical composition of the donor star’s outer layers, the spectral analysis of the disc gives the opportunity to investigate the donor’s nature.

As expected from observations, we find emission-line spectra for low mass-accretion rates and absorption-line spectra for high mass-accretion rates. Furthermore, we find indications for an underabundance of silicon in some systems.