ION SOURCE OF A MASS SPECTROMETER, A MASS SPECTROMETER AND AN IONIZATION METHOD WITH ITS USE Russian patent published in 2022 - IPC H01J49/40 G01N27/62 

FIELD: gas analysis.

SUBSTANCE: invention relates to the field of gas analysis and analysis of volatile organic substances, is intended for the generation of ions with soft ionization and can be used as an ion source in gas chromatographs (GC) with a mass spectrometric detector and other analytical instruments. The ion source of the mass spectrometer contains a vacuum chamber of the mass spectrometer, a channel supplying the analyzed material to the vacuum chamber of the mass spectrometer, a means for forming a molecular flow from the analyzed material entering through the channel, and a means for ionizing the formed molecular flow installed in the vacuum chamber. Means for forming a molecular flow is made in the form of a capillary assembly, consisting of at least two capillaries, connected to a channel supplying the analyzed material to the vacuum chamber of the mass spectrometer, and located between the said supply channel and the ionization means. Also described are a mass spectrometer with the specified ion source and an ionization method using a mass spectrometer.

EFFECT: ensuring controlled fragmentation of molecules, including the exclusion of unwanted fragmentation of molecules during ionization, increasing the sensitivity of the analysis of molecules with the subsequent possibility of easier decoding of mass spectral information, providing a higher signal-to-noise ratio.

10 cl, 4 dwg