METHOD FOR ANALYZING IMPURITIES IN LIQUIDS OR GASES DURING THEIR MICROCHANNEL OUTFLOW IN VACUUM UNDER SUPERSONIC GAS FLOW INFLUENCE CONTAINING IONS AND METASTABLE EXCITED ATOMS WITH FORMATION AND TRANSPORTATION OF ANALYZED IONS IN RF LINEAR TRAP LINKED TO MASS ANALYZER Russian patent published in 2018 - IPC H01J49/00 

FIELD: chemistry.

SUBSTANCE: method provides extraction of ions or their formation from a solution or gas that enters the radiofrequency linear trap of the gas dynamic interface through a microscopic size capillary. The evaporation of the liquid is maintained by the influx of heat from the supersonic gas jet leaving the heated channel. The jet is directed to the outlet end of the capillary, which is surrounded by a cylindrical shell with an inlet for injecting a jet, which stimulates the outlet or formation of the analyzed ions. It is possible to preliminary separate the analyzed ions from the solution by their isoelectric points before entering the capillary and by mobilities during movement inside the capillary under the action of an electric field. Also, ions from the gas mixture and from the solution can be isolated due to differences in the adsorptivity of the corresponding compounds on the chamber walls and with differences in the yield rates of these compounds from the capillary. The trap is coupled to a mass analyzer, for example, a time-of-flight mass spectrometer with orthogonal ion injection.

EFFECT: possibility of characterizing biomolecules in solutions by the equilibrium probabilities of holding different charge carriers by their separate functional groups.

21 cl, 9 dwg