10-1 Mass Spectrometry of Small Molecules: Magnetic-Sector Instruments Mass spectrometry (MS)measures the mass and molecular weight (MW)of a molecule Provides structural information by finding the masses of fragments produced when molecules break apart Three basic parts of mass spectrometers: Sample Display Ionization source Mass analyzer Detector Electron impact(EI),or Magnetic sector,or Photomultiplier,or Electrospray ionization(ESI),or Time-of-flight(TOF),or Electron multiplier,or Matrix-assisted laser Quadrupole(Q) Micro-channel plate desorption ionization(MALDI) Cengge Leaming.All Rights Reserved. Mass spectrometry (MS) measures the mass and molecular weight (MW) of a molecule ▪ Provides structural information by finding the masses of fragments produced when molecules break apart ▪ Three basic parts of mass spectrometers: 10-1 Mass Spectrometry of Small Molecules: Magnetic-Sector Instruments