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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Electron-capture mass spectrometry ： ウィキペディア英語版 Electron-capture mass spectrometry Electron-capture mass spectrometry (EC-MS) is a type of mass spectrometry that uses electron capture ionization (ECI) to form negative ions from chemical compounds with positive electron affinities. The approach is particularly effective for electrophiles. In contrast to electron ionization, EC-MS uses low energy electrons in a gas discharge. The technique can be used with gas chromatography-mass spectrometry. ==Mechanism== The attachment of a low energy electron can give rise to two possible reactions for the compound, as shown below. Either the compound attaches an electron to form a radical anion, :$AB\; +\; e^-\; \backslash to\; AB^$, or the compound fragments, resulting in electron capture dissociation (ECD). ECD forms an anion fragment and a radical fragment :$AB\; +\; e^-\; \backslash to\; A^\; +\; B^$. Fragmentation in ECI has been studied by tandem mass spectrometry. 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「Electron-capture mass spectrometry」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.