Design and characterization of a linear quadrupole ion trap for high-resolution Coulomb-crystal time-of-flight mass spectrometry

被引：20
|
作者：
Rösch, Daniel [1 ]
Gao, Hong [1 ]
Kilaj, Ardita [1 ]
Willitsch, Stefan [1 ]
机构：
[1] Department of Chemistry, University of Basel, Klingelbergstrasse 80, Basel,4056, Switzerland
来源：
EPJ Techniques and Instrumentation | 2016年 / 3卷 / 01期
关键词：
Ions - Calcium compounds - Mass spectrometers - Mass spectrometry - Rate constants;
D O I：
10.1140/epjti/s40485-016-0032-3
中图分类号：
学科分类号：
摘要：
We present and discuss in detail the design and characterization of a new linear quadrupole ion trap with additional ion ejection and acceleration electrodes that is coupled to a time-of-flight mass spectrometer. Mass spectra of Coulomb crystals consisting of Ca +,CaO + and CaOH + ions were recorded with a post-ejection-acceleration scheme yielding a mass resolution of m/Δm≈700. The second order rate constant for the reaction Ca + + N2O → CaO + + N2 was measured to test the usability of this apparatus for ion-molecule reaction studies. The rate constant was found to be 5.49(32)·10−11cm3s−1 which is compared with previous literature values. Owing to the high mass resolution achieved, the present instrument is an ideal tool for the study of the products of complex chemical reactions involving Coulomb crystals.
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