A mass spectrometer, the use, as well as a method for mass spectrometric investigation of a gas mixture

摘要

The present invention relates to a mass spectrometer (1) for the mass spectrometric investigation of gas mixtures (2), comprising: an ionization apparatus (12) as well as an ion trap (10) for storing and for the mass spectrometric investigation of the gas mixture (2). In one aspect of the invention, the ionization apparatus (12) for the supply of ions (13a) and / or of metastable particles (13b) of an ionization gas (13) and / or of electrons (20a) to the ion trap (10) for the ionization of the gas mixture to be examined (2) and the mass spectrometer (1) is designed, in front of the examination of the gas mixture (2) which, in the ion trap (10) existing number of ions (13a) and / or metastable particles (13b) of the ionization gas (13) and / or the number of ions (14a) of a in the ion trap (10) existing residual gas (14) to determine. The present invention also relates to the use of such a mass spectrometer (1) as well as a method for mass spectrometric investigation of a gas mixture (2).