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Questions and Answers
What is the problem with EI mass spectrometry for fragile molecules?
What is the problem with EI mass spectrometry for fragile molecules?
- The energy of the bombarding electron can cause complete fragmentation. (correct)
- The energy of the bombarding electron is too low.
- The energy of the bombarding electron is too high.
- The energy of the bombarding electron does not affect fragile molecules.
What is chemical ionization in mass spectrometry?
What is chemical ionization in mass spectrometry?
- Forming a charged complex by accelerating a molecular ion.
- Mixing a gas such as ammonia with the substrate in the spectrometer. (correct)
- Ionizing an aerosol of the substrate in the presence of sodium ions.
- Fragmentation of the molecular ion by bombarding electrons.
What is the mass spectrum of heptan-2-one in electrospray mass spectrometry?
What is the mass spectrum of heptan-2-one in electrospray mass spectrometry?
- M - 1
- M + Na+
- M + 23 (correct)
- M + 18
