Mass Spectroscopy

In mass spectrometry, the function of the ion source is to:

Separate ions based on mass-to-charge ratio

Detect ions and record signals

Convert neutral molecules into ions

Accelerate ions towards the detector

The mass-to-charge ratio (m/z) in mass spectrometry is usually expressed assuming the charge (z) is:

+2

+1

0

-1

Which type of ion is most commonly observed in electron impact (EI) mass spectrometry?

Radical cations (M⁺·)

Negative ions

Neutral molecules

Protonated molecules ([M+H]⁺)

In mass spectrometry, the base peak represents:

The molecular ion peak

The smallest peak in the spectrum

The peak with the highest relative intensity

The peak with the lowest m/z value

Which technique is most suitable for analyzing large biomolecules like proteins?

Electron impact (EI)

Fast atom bombardment (FAB)

Chemical ionization (CI)

Electrospray ionization (ESI)

Mass Spectroscopy

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