“…calculated for each point of the experimental spectra with corresponding wave number value k i . For automatic artifact positions location we use the method disseminated widely in digital signal processing (Saulnier et al, 1985, Zhuchkov, 2000 and radiophysics (Jeffer & Gupta, 1972, Zerguine et al, 1996. The function f(k) is delayed on several points and is multiplied by itself:…”