天然有机化合物质谱研究——Ⅺ.苯丙型苷快原子轰击质谱MNa+的MIKES谱

研究了六种苯丙型苷与Na⁺加合离子的快原子轰击质谱(FAB—MS)和质量分离离子动能谱(MIKES)。结果表明:在FAB谱中[M+Na]⁺加合离子的丰度要比[M+H]⁺离子高得多。由此可给出糖苷的分子量信息,[M+Na]⁺离子的MIKES谱可给出糖基序列信息。

Study on the mass spectrometry of natural products. XI. The MIKES of fast atom bombardment mass spectra of sodium adduct ions of phenylpropanoid glycosides]

The fast atom bombardment (FAB) mass spectra and mass-selected ion kinetic energy spectra [MIKES] of sodium adduct ions [M + Na]+ of six phenylpropanoid glycosides have been studied. An intense sodium adduct appeared in their FAB mass spectra, which was more abundant than the corresponding protonated molecular ion [M + H]+ and may give more definite information about molecular weight of the sample. The MIKES of these [M + Na]+ ions provided a convenient way for sugar sequence analysis of such glycosides.