The mass spectrometry of DT-and monosubstituted biphenyls: Dependence of fragmentation patterns on position of substitution
β Scribed by Curtis F. Sheley; Robert T. Patterson
- Publisher
- John Wiley and Sons
- Year
- 1974
- Tongue
- English
- Weight
- 594 KB
- Volume
- 9
- Category
- Article
- ISSN
- 1076-5174
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
## Abstract Fragmentations of __N__βbenzyloxycarbonylβprotected tripeptide ethyl esters, in which changes in the numbers and positions of prolyl residues were observed, were examined by negativeβion fast atom bombardment mass spectrometry. A significant difference was found among the intensities of
Breakdown graphs have been constructed from charge exchange data for the ephneric 2-methyl-, 3-methyland 4-methyl-cyclohexanols. Although the breakdown graphs for ephneric p a h are essentialIy identical above -12eV recombination energy, significant M e r e n c a are observed for the epimeric 2-meth
## Abstract We report the first positive chemical ionization (PCI) fragmentation mechanisms of phthalates using tripleβquadrupole mass spectrometry and __ab initio__ computational studies using density functional theories (DFT). Methane PCI spectra showed abundant [M + H]^+^, together with [M + C~2
A continuing effort in mass spectrometry is to optimize desorption/ionization processes in order to enhance analyte ion yields and reduce fragmentation. The effect of small carbohydrate and amino acid matrices on the yield of secondary ions from vitamin B 12 (cyanocobalamin) was examined using plasm