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What is a mass selective detector's advantage over the others?

  • A.It responds equally to every compound
  • B.It identifies as well as quantifies
  • C.It is more sensitive than any alternative
  • D.It requires no vacuum system to operate

Answer: B

Recording a spectrum of each peak gives structural information no other detector provides, turning a retention time into an identification. Electron capture is more sensitive for its own class, a vacuum is essential, and response varies widely between compounds. That a detector can answer what as well as how much is what made the hyphenated technique the reference method in so many fields. A limit that survives making every external component ideal is an intrinsic one, and worth knowing for that reason.

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