| 摘要 |
A mass spectrometer is disclosed comprising a quadrupole rod set ion guide or mass filter device. Broadband frequency signals 13,14 and 15 having a plurality of frequency notches 16a,16b and 16c are applied sequentially to the rods of the quadrupole rod set. The notched broadband frequency signals 16a, 16b and 16c cause undesired ions to be resonantly or parametrically ejected from the ion guide. The resulting ion signals are deconvoluted to provide a mass spectrum. |
