| 翻訳と辞書 |
Orbitrap
An orbitrap is an ion trap mass analyzer consisting of an outer barrel-like electrode and a coaxial inner spindle-like electrode that traps ions in an orbital motion around the spindle.〔Makarov A. (2000). "Electrostatic axially harmonic orbital trapping: A high-performance technique of mass analysis". Analytical Chemistry : AC 72 (6): 1156–62. 〕〔Hu Q, Noll RJ, Li H, Makarov A, Hardman M, Graham Cooks R (2005). "The Orbitrap: a new mass spectrometer". Journal of mass spectrometry : JMS 40 (4): 430–43. doi:10.1002/jms.856. PMID 15838939.〕 The image current from the trapped ions is detected and converted to a mass spectrum using the Fourier transform of the frequency signal.
==History==
The orbitrap is a modification of the ion trap developed by Kingdon in the early 1920s. The Kingdon trap consists of a thin central wire and an outer cylindrical electrode. A static applied voltage results in a radial logarithmic potential between the electrodes. In 1981, Knight introduced a modified outer electrode that included an axial quadrupole term that confines the ions on the trap axis.〔|url=http://link.aip.org/link/?APL/38/221/1|format=|accessdate=2007-11-30〕 Neither the Kingdon nor the Knight configurations were reported to produce mass spectra.
Invention of Orbitrap analyzer and its proof-of-principle by Makarov at the end of 1990-s 〔 started a sequence of technology improvements which resulted in a commercial introduction of this analyzer by Thermo Fisher Scientific as a part of hybrid LTQ Orbitrap instrument in 2005.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Orbitrap」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|