METHOD OF SEPARATING IONS OF ORGANIC AND BIOORGANIC COMPOUNDS IN SUPERSONIC GAS STREAM, PRE-DETECTION AND CONVEYANCE OF SAID IONS INTO SUBSEQUENT MASS ANALYSER Russian patent published in 2013 - IPC H01J49/00 

FIELD: chemistry.

SUBSTANCE: invention relates to separation of ions in a linear radio frequency trap with a gas stream along the axis of said trap based on differences of said ions in appearance energies, mass, charge, mobility, capture cross-sections of slow electrons and metastable excited particles, as well as in efficiency of formation by recharging on ions of a buffer gas when said ions are exposed to alternating and constant electric fields formed inside the trap, including by charges of ions with relatively low m/z, focused around the axis of the trap. In necessary cases, the ions can be additionally separated according to resistance to collision-induced dissociation. The invention is characterised by orthogonal interfacing of the linear radio frequency trap with the subsequent mass analyser using a double-grid electrostatic mirror and pre-detection of ions reflected by said mirror and which do not fall into the mass analyser.

EFFECT: additional separation of ions with the possibility of obtaining, for the analysed compounds, mass spectra of product ions of electron capture, dissociation, activated by collisions and caused by transfer of energy from metastable excited particles of a buffer gas, alternatively or when developing existing separation and structural chemical analysis techniques.

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