天然有机化合物的质谱研究 黄酮和黄酮甙与碱金属离子K+和Na+的快原子轰击质谱

A Study on Alkali Metal Adduct Ions of Progesterone Compounds in Fast Atom Bombardment Mass Spectrometry

中文关键词:  快原子轰击  黄酮  黄酮甙

英文关键词:progesterone compounds  FABMS

中文摘要:

      在作黄酮和黄酮甙的快原子轰击质谱(FAB-MS)时,如果同时加入氯化钠和氯化钾两种碱金属盐,就会在谱图中同时出现[M+K]⁺和[M+Na]⁺两个强峰,由于这两个峰相差16个原子质量单位(amu),很容易辨认,并且发现在其谱图中找不到明显的碎片离子和Na⁺和K⁺的加合离子,而只有其分子和K⁺和Na⁺的加合,所以很容易在FAB谱中识别它们,因而就可以快速、准确地确定样品的分子量.

英文摘要:

      When progesterone compounds were mixed with an appropriate of NaCl and KCl, in the high mass region of their fast atom bombardment mass spectra appeared two strong ion peaks [M+Na]⁺ and [M+K]⁺. This pair of adductions were easily recognized due to the fact that they were very strong (their abundances were higher than that of corresponding [M+H]⁺ in several tens fold) and their mass difference was 16 amu and may give exactly the information about molecurlar weight.