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Mass spectrometry II
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Reading the axes and key peaks

Reading the axes and key peaks

Mass spectrum of propanone with peaks at m/z 15, 43, and 58, showing the base peak, molecular ion, and fragmentation to CH3CO+

A mass spectrum plots relative abundance against the mass-to-charge ratio m/zm/zm/z. In most A-Level organic spectra the ions carry charge +1+1+1, so the m/zm/zm/z value is usually numerically equal to the ion's relative mass.

Mass spectrometry II Lesson

  1. A Level
  2. /Chemistry
  3. /Mass spectrometry II

Step-by-step lessons covering Edexcel A Level Chemistry Mass spectrometry II for A Level Chemistry. Each lesson works through exam-style questions in Paper 1, Paper 2 and Paper 3 format. Build confidence with atomic structure, bonding and moles calculations early on, since these underpin the more demanding organic mechanisms, equilibrium and practical-analysis topics that dominate Year 2.