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We present the results of a spectroscopic campaign on eclipsing binaries withlong orbital period (P = 20 - 75 d) carried out with the CHIRON spectrograph.Physical and orbital solutions for seven systems were derived from the V-band,and I-band ASAS, WASP, and TESS photometry, while radial velocities werecalculated from high quality optical spectra using a two-dimensionalcross-correlation technique. The atmospheric parameters of the stars have beendetermined from the separated spectra. Most of our targets are composed ofevolved stars (sub-giants or red giants) but two systems show components indifferent phases of evolution and one possible merger. For four binaries themasses and radii of the components were obtained with precision better than 3%.These objects provide very valuable information on stellar evolution.

Orbital and physical parameters of eclipsing binaries from the ASAS catalogue -- XI. CHIRON investigation of long-period binaries