ОБОБЩЕННЫЕ КРИТЕРИИ ВЫБОРА УСЛОВИЙ АНАЛИЗА В МАСС-СПЕКТРОМЕТРИИ DART

The results of studies of DART mass spectra for different organic compounds using different mass analyzers and configurations of the vacuum interface, located between the DART source and the entrance to the mass analyzer, are summarized. The dependence of the DART mass spectra on various experimental factors was studied using different mass analyzers and experimental conditions for organic compounds, belonging to different classes. The influence of composition and flow rate of the carrier gas, including the presence or absence of neon in helium, pressure in vacuum interface, temperature and composition of the atmosphere in the ionization region and in the surrounding area, parameters of the ceramic tube of the vacuum interface, and input voltage on the mass analyzer entrance is studied. For the first time, the general recommendations and criteria are outlined for selecting the conditions of registration of DART mass spectra depending on analytes, experimental parameters, and instrumental environment. Keywords : mass spectrometry, direct analysis in real time, DART, optimization, criteria, experimental conditions (Russian) DOI:  http://dx.doi.org/10.15826/analitika.2014.18.3.002 G.A. Kalabin, E.S. Chernetsova Peoples’ Friendship University of Russia, Research and innovation department; Moscow, Russian Federation