| 翻訳と辞書 |
| Spark ionization ： ウィキペディア英語版 |
Spark ionization
Spark ionization (also known as spark source ionization) is a method used to produce gas phase ions from a solid sample. The prepared solid sample is vaporized and partially ionized by an intermittent discharge or spark.〔(IUPAC gold book definition )〕 This technique is primarily used in the field of mass spectrometry. When incorporated with a mass spectrometer the complete instrument is referred to as a spark ionization mass spectrometer or as a spark source mass spectrometer (SSMS).
== History ==
The use of spark ionizaton for analysis of impurities in solids was indicated by Dempster's work in 1935. Metals were a class of material that could not be previously ionized by thermal ionization (the method formerly used for ionizing solid sample). Spark ion sources were not commercially produced until after 1954 when Hannay demonstrated its capability for analysis of trace impurities (sub-part per million detection sensitivity) in semiconducting materials. The prototype spark source instrument was the MS7 mass spectrometer produced by Metropolitan-Vickers Electrical Company, Ltd. in 1959. Commercial production of spark source instruments continued throughout the 50s, 60s, and 70s, but they were phased out when other trace element detection techniques with improved resolution and accuracy were invented (circa 1960s). Successors of the spark ion source for trace element analysis are the laser ion source, glow discharge ion source, and inductively coupled plasma ion source. Today, very few laboratories use spark ionization worldwide.
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「Spark ionization」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.
|
|