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Ion-attachment mass spectrometry : ウィキペディア英語版
Ion-attachment mass spectrometry

Ion-attachment mass spectrometry (IAMS) is a form of mass spectrometry that uses a "soft" form of ionization similar to chemical ionization in which a cation is attached to the analyte molecule in a reactive collision:
:M + X^+ + A \to MX^+ + A
Where M is the analyte molecule, X+ is the cation and A is a non-reacting collision partner.
==Principle==
This technique is applicable to gases or any materials that can be vaporized. It uses a non-fragmenting non-conventional ionisation mode, by attachment of a lithium (or alkaline) ion to the gas to be analysed with a more traditional mass filter. This instrument is more dedicated to analysis of moderately-sized molecules such as organic or aromatic compounds.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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