Four‐sector tandem mass spectrometry: A comparison of the molecular and quasi‐molecular ions of the cyclic depsipeptide valinomycin formed using electron impact, chemical ionization, fast atom bombardment, field desorption and electrospray lonizatfion
Four‐sector tandem mass spectrometry: A comparison of the molecular and quasi‐molecular ions of the cyclic depsipeptide valinomycin formed using electron impact, chemical ionization, fast atom bombardment, field desorption and electrospray lonizatfion
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四扇区串联质谱：使用电子轰击、化学电离、快原子轰击、场解吸和电喷雾离子化形成的环缩酚肽缬氨霉素的分子和准分子离子的比较
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
M. Sheil
中科院分区：
文献类型：
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作者：
J. Curtis;C. Bradley;P. Derrick;M. Sheil
比较了环沉淀肽缬霉素（RMN 1110.6）分子离子和准分子离子的四扇区串联质谱。采用电子冲击（EI）、化学电离（CI）、快原子轰击（FAB）、场解吸（FD）和电喷雾电离等方法制备M +。， [M+H] +， [M+Na] +和[M+K] +离子。[M+Na] +离子的FD和FAB串联质谱之间，以及M+的FD和EI串联质谱之间存在较大差异。离子。光谱之间的差异是由于形成的离子具有相同的质量但不同的结构。[M+Na] +和[M+K] +离子的FAB串联质谱比[M+H] +离子的FAB串联质谱显示出更大的破碎程度
Four-sector tandem mass spectra of the molecular and quasi-molecular ions of the cyclic depsispetide valinomycin (RMN 1110.6) were compared. Electron impact (EI), chemical ionization (CI), fast atom bombardment (FAB), field desorption (FD) and electrospray ionization were used to create M +. , [M+H] + , [M+Na] + and [M+K] + ions from valinomycin. Large differences were found between, the FD and FAB tandem mass spectra of [M+Na] + ions, and between the FD and EI tandem mass spectra of M +. ions. Differences between the spectra are ascribed to the formation of ions having the same mass but different structures. FAB tandem mass spectra of [M+Na] + and [M+K] + ions show greater degrees of fragmentation than do the FAB tandem mass spectra of [M+H] + ions