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92690
GC-MS
Description
gcse chemistry Mind Map on GC-MS, created by Ella Wolf on 16/05/2013.
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chemistry
gcse
Mind Map by
Ella Wolf
, updated more than 1 year ago
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Created by
Ella Wolf
over 11 years ago
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Resource summary
GC-MS
choose a substance to separate
It will travel through a column carried by a gas
the column is packed with solid material
the different substances in the compound travel at different speeds
the time taken for a substance to travel through the column can be used to help identify the sunstance
the number of peaks on the output shows the number of compounds present
the position of the peaks on the output indicates the retention time
the output can be linked to a mass spectrometer which can be used to identify the substances leaving the end of the column
a mass spectrometer can identify substances quickly and accurately
the mass spectrometer can give the molecular mass of each substance
the molecular mass is given by the molecular ion peak
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