@谱 511质谱仪 Sample molecules enter here Filament Electron lonizing region Heater First accelerating slit Gas Second accelerating slit Molecular chamber Ions not lons in Detector in register register assembly lon accelerating Magnetic field Analyzer tube To Collecto spectrum N recorder FIGURE F 1 Mass spectrometer. Schematic diagram of CEG model 21-103. The magnetic field that brings ions of varying mass/ charge(m/a) ratios into register is perpendicular to the page. From John R Holum, Organic Chemistry: A Brief Course, Wiley. New York, 1975. Used with permission.5.1.1 质谱仪