Structural Analysis of 9-Acridinylmethyl Derivatives of Fatty Acids by Mass Spectrometry

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Characterization of electron impact mass spectra of 9-acridinylmethyl esters of fatty acids was reported. The esters gave molecular ions with relatively strong intensity and simple fragmentation patterns. Fragmentation ions appeared with 14 mass unit separations in the spectra of saturated fatty acid esters. In the spectra of unsaturated fatty acid esters, the 26 mass unit separations were observed at the position of double bonds in the molecule. Ions (M-30)⁺ and (M-31)⁺ suggested the existence of a hydroxymethyl group and the 29 and 30 mass unit separations suggested the positions of hydroxy groups located in the molecule. These fragmentations were useful for the structural analysis of fatty acids.