1. Isotope ratio mass spectrometry : devices, methods, applications / V.S. Sevastyanov -- 2. Universal method for preparation of liquid, solid and gaseous samples for determining the isotopic composition of carbon / T.A. Velivetskaya, A. Ignat'ev, S. Kiyashko -- 3. Using isotope ratio mass spectrometry for assessing the metabolic potential of soil microbiota / A.M. Zyakun and O. Dilly -- 4. Study of the isotopic composition of normal alkanes of continental plants / N.A. Pedentchouk -- 5. Using isotope ratio mass spectroscopy for analysis of tobacco / A.B. Uryupin -- 6. Using isotope mass ratio spectrometry of carbon in doping control / T. Sobolevski, I.S. Prasolov and G.M. Rodchenkov -- 7. Isolation methods in isotope geochemistry of noble gases / A.I. Buikin -- 8. Using laser spectroscopy for measuring the ratios of stable isotopes / V.S. Sevastyanov.