Mass Spectrometry The parent ion is called the molecular ion peak(M+) 100- Hs-1-3448 80 60 40 m/z72 20 0 10 203040 5060708090100110120 m/z Can find molecular ion,but what are the other peaks?Mass Spectrometry The parent ion is called the molecular ion peak (M+) m/z 72 Can find molecular ion, but what are the other peaks?