Collision cell with integrated ion selector for ms/ms-time-of-flight mass-spectrometer

Abstract From the Canadian patent

It is practice to fragment Ions in an MS/MS-time-of-flight mass-spectro-meter by colliding them with the molecules or atoms of some collision gas. In order to assign the fragment ions to their respective parent ions some, ion selecting mechanism such as an ion gate must be used to preselect one specific mass of the primary ion spectrum. Usually the combination of both elements a collision cell and an ion, selector will need so much space that the size of the mass-spectrometer will increase, also reducing its sensitivity. This effect can be avoided by, integrating ion selector and collision cell into one unit.