Machine-translated by Google. Questions are authored in English.
Top

Discussion

What does a tandem mass spectrometry experiment do?

  • A.Selects one ion, fragments it and analyses the products
  • B.Runs two samples through the instrument at once
  • C.Measures each ion twice for better precision
  • D.Combines two ionisation methods in one source

Answer: A

Selecting a precursor ion, breaking it by collision with a gas, and scanning the fragments gives structural information about that one component even in a complex mixture. It does not run two samples, repeat a measurement or combine sources. Isolating one species before fragmenting it is what makes the technique so powerful for mixtures, where an ordinary spectrum would be an uninterpretable superposition. Checking the units of each quantity catches a wrong formula before the arithmetic begins.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.