| 翻訳と辞書 |
| Fragmentation (chemistry) ： ウィキペディア英語版 |
Fragmentation (mass spectrometry)
In mass spectrometry, fragmentation is the dissociation of energetically unstable molecular ions formed from passing the molecules in the ionization chamber of a mass spectrometer. The fragments of a molecule cause a pattern in the mass spectrum used to determine structural information of the molecule.
== Mass spectrometry techniques ==
Fragmentation can occur in the ion source (in-source fragmentation) where it is generally not a desired effect. Ion source conformation is an important criterion in the level of fragmentation observed.
Desired fragmentation is made in the collision zone (post-source fragmentation) of a tandem mass spectrometer. It is a part of gas phase ion chemistry and there are different types of mass fragmentation:
collision-induced dissociation (CID),
electron-capture dissociation (ECD),
electron-transfer dissociation (ETD),
negative electron-transfer dissociation (NETD),
electron-detachment dissociation (EDD),
photodissociation, particularly infrared multiphoton dissociation (IRMPD) and blackbody infrared radiative dissociation (BIRD),
surface-induced dissociation (SID),
Higher-energy C-trap dissociation (HCD),
charge remote fragmentation.
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「Fragmentation (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.
|
|