15.4 (a) Draw the structures of the species that correspond to each peak A-E in the following mass spectrum of heptane. (b) Identify the Mt peak, the M + 1 peak, and the base peak. Relative abundance 100- 80- 60 40- 20 ott 0 B D E 10 20 30 40 50 60 70 80 90 100 110 120 m/z

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Mass Spectrometry

This process is an instrumental method in which a sample is changed to fast moving positive ions by electron bombardment. The charged particles vary due to their different mass to charge ratio and are estimated with the help of this difference. It is also called mass spectroscopy.