Positive and negative ion methane chemical ionization mass spectrometry of amino acid pentafluorobenzyl derivatives
โ Scribed by A. G. Netting; A. M. Duffield
- Publisher
- John Wiley and Sons
- Year
- 1985
- Tongue
- English
- Weight
- 448 KB
- Volume
- 12
- Category
- Article
- ISSN
- 1076-5174
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๐ SIMILAR VOLUMES
Negative ion chemical ionization (CI-) mass spectra of the commonly occurring amino acids are simple and give information regarding molecular weight by the presence of [M + Cll-adduct in the case of simple amino acids and [M -win the case of amino acids containing additional polar group. tert-Butylo
A solution of ethyl chloroformate + trifluoroethanol (or ethanol) + pyridine reacts rapidly with carboxylic and amino groups of amino acids to form n-ethoxycarbonyl amino acid trifluoroethyl (or ethyl) esters, which produce strong peaks representative of molecular ions in both positive and negative
The methyl and pentafluorobenzyl esters of the plant hormone abscisic acid were subjected to methane chemical ionization tandem mass spectrometry (MS/MS). The spectra obtained allow the unambiguous identification of abscisic acid in a few milligrams of plant material. In full-scan mode pentafluorobe