TANDEM TIME-OF-FLIGHT MASS SPECTROMETER

摘要

A tandem time-of-flight mass spectrometer comprises a grounded vacuum housin g (7), two reflecting-type mass analyzers (1, 2) coupled via a collision chamber (15) and flight channels (3, 4) electrically floated with respect to the grounded vacuum housing (7). The first reflecting-type mass analyzer (1) receives ionized molecules (ions). These ions pass through the flight chan- nel (3) of the first reflecting-type mass analyzer (1) and are fragmented in the collision chamber (15). The fragmented ions pass through the flight channel (4) of the second reflecting-type mass analyzer (2). Detectors (03, 04) disposed in the collision chamber (15) and in the second reflecting-type mass analyzer (2) detect the spectrum of the first reflecting-type mass analyzer (1) and the spectra of the tandem time-of-flight mass analyzer (100) respectively.< /SDOAB>