| 摘要 |
The present invention provides a mass spectrometer capable of breaking even a sample molecule having a large molecular weight by a CID process. In an embodiment of the present invention, the mass spectrometer includes an ionizing source 10 for turning a sample into ions, mass-separating sections 40 and 60 for mass-separating the sample ions, a detecting section 20 for detecting the mass-separated ions, and a collision section (collision cell) 51 located on an ion path extending from the ionizing source 10 through the mass-separating sections 40 and 60 to the detecting section 20 . It also includes a cluster generator 30 for producing clusters of atoms or molecules. The clusters produced by the cluster generator 30 are introduced into the collision cell 51 . The use of the clusters having a huge mass as the target gas in the CID process enables the collision energy of the sample ions to be efficiently assigned to the breaking of the ions.
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