Mass spectrometry is used to find the atomic mass and relative abundances of isotopes in an element.
Fragmentation pattern
Strongest peak calibrated to 100%
Molecular ion peak may be too low to see
Molecule with only one electron removed, \(M^+\)
Peak at \(M+1\) due to Carbon-13
1.1% of Carbon is Carbon-13
All molecules and fragments are ionised
Must be denoted with charge of +1
Groups can be conspicuos by absence