Abstract A 1D laser Raman system for the simultaneous measurement of the major species concentrations, mixture fraction, and temperature in gas turbine-like flames is presented. The adaptation of the measuring technique to the test rig and the particular challenges of the measurements are described. The gas turbine model combustor was operated with natural gas and preheated air at pressures of 2 and 10 bar. The measurements characterized the mixing and reaction progress and revealed strong effects of turbulence-chemistry interactions with large deviations from chemical equilibrium. The single-shot data obtained along the imaged line of 7 mm allowed the investigation of spatial correlations. Together with the results from further measurements with different methods, the Raman data form an experimental data base that is used for the validation of LES simulations.