A study of phospholipids by ion mobility TOFMS.

A study of phospholipids by ion mobility TOFMS.
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DOI:
10.1016/j.jasms.2008.07.005
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发表时间:
2008-11
影响因子:
3.2
通讯作者:
Woods AS
Woods AS
中科院分区:
化学3区
文献类型:
--
作者:
Jackson SN;Ugarov M;Post JD;Egan T;Langlais D;Schultz JA;Woods AS

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将基质辅助激光解吸电离(MALDI)与离子迁移率(IM)相结合,实现了复杂混合物中生物分子沿趋势线的快速分选。在这一生物家族的二维分析中,脂类、多肽和核苷酸在数百微秒的时间尺度上,由于它们的离子迁移率漂移时间的差异而彼此分开。类似化学类型的分子离子在绘制成离子迁移率漂移时间与m/z的函数的二维曲线图时,沿着趋势线下降。在这项研究中,MALDI-IM MS被用于分析所有主要磷脂类别的物种。对包括组织提取液和切片在内的复杂样品进行了探索,证明了吡啶链长、不饱和度和类/头基团对离子在气相中的截面积的影响。我们说明了如何利用这些变化来识别复杂混合物中的单个脂质物种,以及阳离子对离子截面和电离效率的影响。
Combining matrix-assisted laser desorption/ionization (MALDI) mass spectrometry with ion-mobility (IM) results in the fast sorting of biomolecules in complex mixtures along trend lines. In this 2D analysis of biological families, lipids, peptides, and nucleotides are separated from each other by differences in their ion mobility drift times in a timescale of hundreds of microseconds. Molecular ions of similar chemical type fall along trend lines when plotted in two-dimensional plots of ion mobility drift time as a function of m/z. In this study, MALDI-IM MS is used to analyze species from all of the major phospholipid classes. Complex samples including tissue extracts and sections were probed to demonstrate the effects that radyl chain length, degree of unsaturation, and class/head group have upon an ion’s cross section in the gas-phase. We illustrate how these changes can be used to identify individual lipid species in complex mixtures, as well as the effects of cationization on ion cross section and ionization efficiency.
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