| 摘要 |
<p>Mass spectrometry for discriminating monovalent and multivalent ions easily using an ion trap mass stectrometer having a mass spectrometric analysis section provided with a ring electrode and a pair of end cap electrodes and performing mass spectrometry by temporarily trapping ions by a three-dimensional quadrupole field. The mass spectrometry comprises a first step for generating a three-dimensional quadrupole field by applying a main high frequency voltage to the ring electrode, a second step for generating ions in the mass spectrometric analysis section or implanting ions externally and trapping ions having a mass/charge ratio within a specified range in the mass spectrometric analysis section, a third step for applying an auxiliary AC voltage having a plurality of components between the end gap electrodes and scanning the frequency components thereof, and a fourth step for scanning the main high frequency voltage and discharging ions from mass spectrometric analysis section.</p> |
