Mass spectrometry (AQA A-Level Chemistry): Flashcards
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10 cards from this deck
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Practise the cards
10 cards from this deck
Purpose of mass spectrometry
Purpose of mass spectrometry
Determine molecular mass and formula of compounds
m/z in mass spectrometry
m/z in mass spectrometry
Mass-to-charge ratio
Ionisation in mass spectrometry
Ionisation in mass spectrometry
High-energy electrons create positive molecular ions
What deflects ions by their m/z ratio?
What deflects ions by their m/z ratio?
Magnetic field
Location of molecular ion peak ()
Location of molecular ion peak ()
Highest m/z value in spectrum
What molecular ion peak () indicates
What molecular ion peak () indicates
of whole molecule
What fragmentation peaks represent
What fragmentation peaks represent
Fragments of the original molecule
HRMS precision
HRMS precision
Four decimal places
HRMS m/z: propane () vs ethanal ()
HRMS m/z: propane () vs ethanal ()
44.0624 vs 44.0302
First step to find molecular formula from mass spectrum
First step to find molecular formula from mass spectrum
Locate peak, use precise m/z value