METHOD OF ANALYZING IMPURITIES IN LIQUIDS IN INFILTRATION THROUGH TRACK MEMBRANE WITH FORMATION AND TRANSPORTATION OF ANALYZED IONS THROUGH LINEAR RADIO FREQUENCY TRAP INTO MASS ANALYZER WHEN EXPOSED TO SUPERSONIC GAS STREAM WITH POSSIBLE CONTENT OF METASTABLE ATOMS IN IT Russian patent published in 2016 - IPC H01J49/00 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical analysis of impurity compounds and ions in solutions. Basis of the invention is extraction of ions or their formation from a solution infiltrating into a vacuum part of a gas-dynamic interface via a track membrane under the action of atmospheric pressure and electric field in channels of the membrane. Liquid evaporation is supported by electric heating while passing current through a conductive coating on the membrane surface. Output and formation of ions are stimulated by the action of jets of a supersonic gas stream at possible content of metastable excited atoms in it formed when the stream flowing through an electronic source of ionization or a gas discharge area. Possible is a preliminary accumulation, separation and collision-induced dissociation of selected ions coming into a linear radio frequency trap of the gas-dynamic interface together with other jets of the supersonic gas flow to develop relatively small additional gas density near the axis of this trap. Trap is coupled with a mass-analyzer, for example a time-of-flight mass-spectrometer with an orthogonal ion input.

EFFECT: provided is the possibility of characterizing biomolecules in solutions by equilibrium probabilities of retention of various charge carriers with their individual ionogenic groups.

19 cl, 10 dwg