Time series of SVD I (top) and V (bottom) spectra of HD 101412 obtained using different line masks. The profiles are shifted upwards and Stokes V profiles are multiplied by ten for better visibility. From left to right the results correspond to the following line samples: the sample of 650 lines belonging to various iron-peak elements assuming T_eff = 8300 K, the sample of 339 Fe i lines (T_eff = 8300 K), the sample of 29 Fe i lines assuming T_eff = 10 000 K, and the sample of 52 Fe ii lines (T_eff = 8300 K). The vertical dashed lines indicate the velocity interval used for the magnetic field measurements.