Mass Spectrometry Process

Mindmap of Mass Spectroscopy

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  • Mass Spectrometry
    • 1. Vaporisation
      • Sample turned into a gas using an electric heater
    • 2. Ionisation
      • Electrons knocked off to form positive ions
        • Most have charge of +1, as it is much harder to remove second electron
      • Gas particles bombarded with high energy electrons
    • 3. Acceleration
      • Positive ions accelerated using an electric field
    • 4. Deflection
      • Positive ions pass through magnetic field
      • Paths alter depending on m/z ratio
      • For a particular magnetic field, only ions with a particular m/z ratio reach detector
    • 5. Detection
      • Magnetic field strength gradually increased. Ions with higher m/z ratio reach detector
      • Ions hit detector - current induced is proportional to abundance of ions with m/z ratio
      • Electrons transferred from the detector to the + ion, causing current to flow
  • 2. Ionisation
    • Electrons knocked off to form positive ions
      • Most have charge of +1, as it is much harder to remove second electron
    • Gas particles bombarded with high energy electrons

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