  We discuss the way of increasing of the number of chemical elements,
investigated in stellar spectra. We can reach it by using spectrum synthesis
method, new atomic data and observation of stellar spectra with resolution
comparable to solar spectral atlases. We show two examples of this kind
researches. The first is the implementation of new atomic data to well known
Przybylski's star. We show that the number of spectral lines, which can be
identificated in the spectrum of this star can be significantly higher. The
second example is the investigation of zeta Cyg. We found the abundances of 51
elements in the atmosphere of this mild barium star.
