Generation of CsI Cluster Ions for Mass Calibration in Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry

被引：43

作者：

Lou, Xianwen ^{[1
]}

van Dongen, Joost L. J. ^{[1
]}

Meijer, E. W. ^{[1
]}

机构：

[1] Eindhoven Univ Technol, Lab Macromol & Organ Chem, NL-5600 MB Eindhoven, Netherlands

来源：

JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY | 2010年 / 21卷 / 07期

关键词：

TIME-OF-FLIGHT; DESORPTION IONIZATION; ACCURATE MASS; DELAYED EXTRACTION; HIGH-RESOLUTION; ELECTROSPRAY-IONIZATION; MALDI; SPECTRA; PROTEINS; VELOCITY;

D O I：

10.1016/j.jasms.2010.02.029

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

A simple method was developed for the generation of cesium iodide (CsI) cluster ions up to m/z over 20,000 in matrix-assisted laser desorption/ionization mass spectrometry (MALDI MS). Calibration ions in both positive and negative ion modes can readily be generated from a single MALDI spot of CsI(3) with 2-[(2E)-3-(4-tert-butylphenyl)-2-methylprop-2-enylidene] malononitrile (DCTB) matrix. The major cluster ion series observed in the positive ion mode is [(CsI)(n)Cs](+), and in the negative ion mode is [(CsI)(n)I](-). In both cluster series, ions spread evenly every 259.81 units. The easy method described here for the production of CsI cluster ions should be useful for MALDI MS calibrations. (J Am Soc Mass Spectrom 2010, 21, 1223-1226) (C) 2010 American Society for Mass Spectrometry

引用

页码：1223 / 1226

页数：4

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