| 摘要 |
In the ion transport system for transporting ions from the ion source to the mass spectrometer, the multipole ion guide for transmitting ions necessary for analysis highly efficiently and eliminating unwanted ions before arriving at the mass spectrometer is realized. The mass spectrometer has the ion source for ionizing a specimen, the ion transport system using the multipole radio frequency electric field more than the quadrupole electric field, the ion injection unit for injecting ions passing through the transport system into the mass spectrometer, the mass spectrometer for separating and analyzing ions by the mass-to-charge ration of the ions, and the detector for detecting ions subjected to mass spectrometric analysis. The mass spectrometer has the control means for changing the multipole electric field of radio frequency generated in the transport system according to the mass-to-charge ratio of ions passing through the transport system.
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