INFLUENCE OF INSTRUMENTAL PARAMETERS AND SAMPLE PREPARATION ON MASS-ANALYZED ION KINETIC-ENERGY SPECTRA WITH FAST-ATOM-BOMBARDMENT EXEMPLIFIED WITH THE OXONIUM ION OF PERACETYLATED RIBOPYRANOSE

被引:8
作者
BLOKTIP, L
HEERMA, W
HAVERKAMP, J
机构
[1] Department of Mass Spectrometry, Bijvoet Center for Biomolecular Research, University of Utrecht, Utrecht, 3508 TB
来源
ORGANIC MASS SPECTROMETRY | 1993年 / 28卷 / 02期
关键词
D O I
10.1002/oms.1210280211
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
When mass-analysed ion kinetic energy (MIKE) spectra are required to discriminate between isomeric ions formed under conditons of fast atom bombardment (FAB) in the ion source, severe interference may be observed. The interfering peaks in MIKE spectra obtained with a reversed-geometry instrument can arise from different sources. Moreover, the intensity distribution of the true ions from the selected precursor ion may depend strongly on the instrument being used. This means that the FAB-MIKE or collisionally induced dissociation (CID) spectrum is not an absolute characteristic of a particular ion. The [M + H - HOAc]+ ion in the spectrum of peracetylated ribopyranose is used as an example to illustrate this and to trace and discuss the origin of the phenomena observed.
引用
收藏
页码:123 / 126
页数:4
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