METHOD FOR STRUCTURAL CHEMICAL ANALYSIS OF ORGANIC AND BIOORGANIC COMPOUNDS WHILE SEPARATING IONS OF SAID COMPOUNDS IN SUPERSONIC GAS STREAM DIRECTED ALONG LINEAR RADIO-FREQUENCY TRAP Russian patent published in 2011 - IPC H01J49/00 H01J49/36 

FIELD: physics.

SUBSTANCE: invention is based on separation of ions in a linear radio-frequency trap in a gas stream near the axis of said trap based on differences in mass, charge and mobility of ions when said ions are exposed to alternating and constant electric fields, created inside the trap, including charges of ions with relatively small m/z, focused around the axis of the trap, wherein ions can further be separated based on degree of resistance to collision-induced dissociation. The disclosed method involves detection of directed signals from rotating or oscillating ions derived from the gas stream by volume charge relative small ions or a non-resonance rotating field and also under the effect of fields, close on resonant on frequency, which excite harmonic motion of ions with selected m/z values. Recording of mass-spectra of product ions during collision-induced dissociation can also be carried out using a mass analyser interfaced with the trap, particularly time-of-flight mass analyser with an orthogonal ion input.

EFFECT: possibility of obtaining two mass-spectra of ions produced via dissociation activated by single or multiple collisions for analysed compounds.

21 cl, 11 dwg