Ella Wolf
Mind Map by , created over 6 years ago

gcse chemistry Mind Map on GC-MS, created by Ella Wolf on 05/16/2013.

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Ella Wolf
Created by Ella Wolf over 6 years ago
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GC-MS
1 choose a substance to separate
1.1 It will travel through a column carried by a gas
1.1.1 the column is packed with solid material
1.1.1.1 the different substances in the compound travel at different speeds
1.1.1.1.1 the time taken for a substance to travel through the column can be used to help identify the sunstance
1.1.1.1.1.1 the number of peaks on the output shows the number of compounds present
1.1.1.1.1.1.1 the position of the peaks on the output indicates the retention time
1.1.1.1.1.1.1.1 the output can be linked to a mass spectrometer which can be used to identify the substances leaving the end of the column
1.1.1.1.1.1.1.1.1 a mass spectrometer can identify substances quickly and accurately
1.1.1.1.1.1.1.1.1.1 the mass spectrometer can give the molecular mass of each substance
1.1.1.1.1.1.1.1.1.1.1 the molecular mass is given by the molecular ion peak

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