Which of these two molecules shown below will produce the most abundant (highest intensity) molecular ion in mass spectrometry? Give reasons for your answer. 0 O )K/V.The Relative Abundance of Molecular Ions in Mass Spectrometry

The Relative Abundance Of Molecular Ions In Mass Spectrometry

Molecular ions play an essential role in mass spectrometry for the identification and measurement of molecules. Molecular ions form when an ionized molecules is bombarded in electrons. The result is the cleavage bonds being broken and the formation o a fragment. In determining the identity of a molecule, it is important to determine the relative amount of molecularions. To determine the molecular Ion with highest intensity (most abundant) we’ll use two molecules. Molecules A and B contain one oxygen atom, one potassium. In mass spectrometry, the presence of a heavy element, such as an oxygen or potassium atom, can raise the concentration of molecular Ions in molecules. The reason is that the heavier atom makes it harder for the molecular to fracture when subjected to electron bombardment. In mass spectrometry, molecules A and B are more likely to have a higher concentration (or a greater intensity) of molecular Ions.

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