Structural analysis of fatty acids by mass spectrometry of picolinyl esters and dimethyloxazoline derivatives
โ Scribed by Gary Dobson; William W. Christie
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 965 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0165-9936
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A rapid, mild procedure is described for the synthesis of picolinyl esters of branched-chain, cyclic and unsaturated fatty acids, dicarboxylic acids and hydroxy acids by the reaction of the derived acid chloride with 3-pyridylcarbinol. The mass spectra of these derivatives contained abundant diagnos
Picoliiyl and methyl ester derivatives of all the isomeric thialaurates and thiastearates, together with some dithiastearates, have been characterized by gas chromatography/mass spectrometry. The picolinyl ester derivatives give simple electron impact mass spectra in which ions formed by cleavage at
The electron impact (EI) mass spectral analysis of the picolinyl esters of nine positional isomers of conjugated diacetylenic fatty acids showed prominent M + and [M-l] + peaks. In all cases there was a regular series of ions 14 amu apart in the high molecular weight range until the triple bond syst