Patent ID: 6828551
Filing Date: 2004-12-07
Classification: H01J

Abstract:
A mass spectrometer system for mass analysis of a sample to be measured, by ionizing the sample, comprising:a first ion source for ionizing the sample; a second ion source for producing ions of a polarity reversed from that of the ions produced in said first ion source; an ion deflector for introducing and deflecting the ions of said first and second ion sources; an ion-trap mass spectrometer including a ring electrode and a pair of endcap electrodes; a detector for detecting the ions ejected from said mass spectrometer, wherein the ions from said first and second ion sources are introduced together through said ion deflector into said ion-trap mass spectrometer; the ions from the two ion sources are mixed in said ion-trap mass spectrometer; and the ions are then detected in said detector; a third ion source for ionizing the sample to be measured; a fourth ion source for producing ions of a polarity reversed from that of the ions produced in said third ion source; and a second ion deflector for introducing and deflecting the ions coming from said third and fourth ion sources, wherein said second ion deflector is arranged between said ion-trap mass spectrometer and the detector.