Fung E T, Wilkins C L
Department of Chemistry, University of California, Riverside 92521.
Biomed Environ Mass Spectrom. 1988 Jun 1;15(11):609-13. doi: 10.1002/bms.1200151106.
Mass spectra of six representative underivatized steroids and three parent hydrocarbons were obtained using laser desorption/Fourier transform (LD/FT) mass spectrometry. The carbonyl steroids, with the exception of aldosterone, yielded abundant [M + H]+ ions. For cholesterol, a major fragment ion was that corresponding to dehydration. The hydrocarbons produced [M + H]+, M+ and [M - H]+ ions, in addition to expected alkyl cleavage ions including those resulting from methyl loss. The LD/FT mass spectra of all were qualitatively similar to electron ionization spectra, but showed somewhat less fragmentation.
使用激光解吸/傅里叶变换（LD/FT）质谱法获得了六种代表性未衍生化甾体和三种母体烃的质谱图。除醛固酮外，羰基甾体产生了丰富的[M + H]+离子。对于胆固醇，一个主要碎片离子对应于脱水。这些烃除了产生预期的烷基裂解离子（包括那些因甲基丢失而产生的离子）外，还产生了[M + H]+、M+和[M - H]+离子。所有这些物质的LD/FT质谱图在定性上与电子电离光谱相似，但碎片化程度略低。
