Acetone chemical ionization mass spectrometry
β Scribed by S. Prabhakar; M. Vairamani
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 399 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0277-7037
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π SIMILAR VOLUMES
The hydrogen and isobutane chemical ionization mass spectra of a number of carotenoids, with symmetrical and unsymmetrical end groups, have been examined. Similar spectra were obtained with each gas. Loss of fragments, characteristic of both the polyene chain and of the end groups were shown by all
Acetone chemical ionization mass spectra of 16 natural Ξ±-amino acids and 5 free nucleobases show characteristic ions corresponding to [M + H] + , [M + 43] + and [M + 59] + ions. The proton affinities of the substrates are found to control the formation of the above ions. The site of acetylation of a