Mass Spectrometry!!!

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  • Created by: Hannah
  • Created on: 28-12-12 14:03

(http://www.chemguide.co.uk/analysis/masspec/masspec.GIF)

Mass Spectrometry!

 

There are 4 main stages in Mass Spectrometry:

1) IONISATION!

2) ACCELERATION!

3) DEFLECTION!

4) DETECTION!

 

IONISATION is when an ELECTRON GUN fires a beam of HIGH energy electrons into the vapourised sample knocking out electrons from the atoms or molecules so that they form POSITIVE ions, mostly with a 1+ charge!

 

 

ACCELERATION is where NEGATIVELY charged metal plates accelerate the positive ions down the tube. These plates produce an electric FIELD which ATTRACTS the positive ions, causing them to accelerate along the tube. Holes in the plates allow some ions to pass through forming a beam of positive ions.

 

DEFLECTION (can also be known as seperation) is when an

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