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Mass Spectroscopy

Mass Spectroscopy. As Applied to Organic Molecules By Jim Tyser. M.S. How It Works. The physics behind mass spectrometry is that a charged particle passing through a magnetic field is deflected along a circular path on a radius that is proportional to the mass to charge ratio, m/e.

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Mass Spectroscopy

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  1. Mass Spectroscopy As Applied to Organic Molecules By Jim Tyser

  2. M.S. How It Works • The physics behind mass spectrometry is that a charged particle passing through a magnetic field is deflected along a circular path on a radius that is proportional to the mass to charge ratio, m/e.

  3. M.S. How It Works • A high energy beam of electrons is used to displace an electron from the organic molecule to form a radical cation known as the molecular ion. • If the molecular ion is too unstable then it can fragment to give other smaller ions.

  4. MS How It Works • The collection of ions is then focused into a beam and accelerated into the magnetic field and deflected along circular paths according to the masses of the ions. • By adjusting the magnetic field, the ions can be focused on the detector and recorded.

  5. M.S. How It Works

  6. M.S. Vocabulary

  7. M.S. Spectrum 142 g/mol – 113 g/mol = 29 g/mol

  8. M.S. Spectrum Why is there a small peak at 109 g/mol?

  9. M.S. Spectrum Note presence of 79Br and 81Br

  10. M.S. Spectrum

  11. Acknowledgements I would like to acknowledge that most of the information presented came from the website: http://www.mhhe.com/physsci/chemistry/carey/student/ol/ch13ms.html

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