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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 Helium ionization detector ： ウィキペディア英語版 Helium ionization detector A helium ionization detector (HID) is a type of detector used in gas chromatography. ==Principle== HID connected to a GC has the great advantage to use helium as both the carrier gas and the ionization gas. HID is a ion detector which uses a radioactive source, typically β-emitters, to create metastable helium species.The radioactive source ionizes helium atoms by bombarding them with emissions. The metastable helium species have an energy of up to 19.8 eV. These metastable helium species can ionize all compounds with the exception of neon which has a bigger ionization potential of 21.56 eV. As components elute from the GC's column they collide with the metastable helium ions, which then ionize the components. The ions produce an electric current, which is the signal output of the detector. The greater the concentration of the component, the more ions are produced, and the greater the current. 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「Helium ionization detector」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.