The Mass Spectrometer

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  • Created by: EveKidney
  • Created on: 02-01-15 11:02
What happens in the sample inlet?
Gases or Liquids are simply injected but solids are heated to vaporise them
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What happens in the Ionisation Area?
A heated filament produces high-energy electrons, these electrons bombard any atoms or molecules in the sample and knock electrons out.
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What is formed in the Ionisation Area?
Cations (positive ions) are formed
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What happens in the Acceleration Area?
An electric field is used to accelerate any ions so that they all have the same kinetic energy.
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Why is there a vacuum in the Drift Region?
So that ions do not collide with air molecules, which could change the direction of their flight path.
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Do all Ions have the same kinetic energy?
YES!
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Do heavier Ions Move through the drift region more slowly or quicker than light ions?
Heavier Ions move throughout the drift region more slowly than light ions.
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Do light Ions reach the detector before heavier ones?
YES!
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What does the computer do with the information?
Converts the information into a mass spectrum
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What is detected after Fragmentation?
Positive Ions
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Other cards in this set

Card 2

Front

What happens in the Ionisation Area?

Back

A heated filament produces high-energy electrons, these electrons bombard any atoms or molecules in the sample and knock electrons out.

Card 3

Front

What is formed in the Ionisation Area?

Back

Preview of the front of card 3

Card 4

Front

What happens in the Acceleration Area?

Back

Preview of the front of card 4

Card 5

Front

Why is there a vacuum in the Drift Region?

Back

Preview of the front of card 5
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