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Descriptor English: Tandem Mass Spectrometry
Descriptor Spanish: Espectrometría de Masas en Tándem
Descriptor espectrometría de masas en tándem
Entry term(s) espectrometría de masa en tandem
Scope note: Técnica de espectrometría de masas que utiliza dos (MS/MS) o más analizadores de masas. Con dos en tándem, los iones precursores son seleccionados según masas por el primer analizador, y enfocados hacia una región de colisión donde se fragmentan en los productos de los iones que, a continuación, son identificados por el segundo analizador de masas. Para separar los compuestos se han utilizado muy diversas técnicas, ionizándolos, e introduciéndolos en el primer analizador. Por ejemplo, en el caso de GC-MS/MS, se utiliza CROMATOGRAFÍA DE GASES-ESPECTROMETRÍA DE MASAS para separar los compuestos relativamente pequeños mediante CROMATOGRAFÍA DE GASES antes de inyectarlos en una cámara de ionización para la selección de masas.
Descriptor Portuguese: Espectrometria de Massas em Tandem
Descriptor French: Spectrométrie de masse en tandem
Entry term(s): Mass Spectrometry Mass Spectrometry
Mass Spectrometry, Tandem
Mass Spectrometry-Mass Spectrometry
Tree number(s): E05.196.566.880
RDF Unique Identifier: https://id.nlm.nih.gov/mesh/D053719
Scope note: A mass spectrometry technique using two (MS/MS) or more mass analyzers. With two in tandem, the precursor ions are mass-selected by a first mass analyzer, and focused into a collision region where they are then fragmented into product ions which are then characterized by a second mass analyzer. A variety of techniques are used to separate the compounds, ionize them, and introduce them to the first mass analyzer. For example, for in GC-MS/MS, GAS CHROMATOGRAPHY-MASS SPECTROMETRY is involved in separating relatively small compounds by GAS CHROMATOGRAPHY prior to injecting them into an ionization chamber for the mass selection.
Allowable Qualifiers: CL classification
EC economics
ES ethics
HI history
IS instrumentation
MT methods
SN statistics & numerical data
ST standards
TD trends
VE veterinary
Previous Indexing: Spectrum Analysis, Mass or specifics (1981-2006)
Public MeSH Note: 2007
History Note: 2007
DeCS ID: 52433
Unique ID: D053719
Documents indexed in the Virtual Health Library (VHL): Click here to access the VHL documents
Date Established: 2007/01/01
Date of Entry: 2006/07/05
Revision Date: 2015/06/16
Tandem Mass Spectrometry - Preferred
Concept UI M0495818
Scope note A mass spectrometry technique using two (MS/MS) or more mass analyzers. With two in tandem, the precursor ions are mass-selected by a first mass analyzer, and focused into a collision region where they are then fragmented into product ions which are then characterized by a second mass analyzer. A variety of techniques are used to separate the compounds, ionize them, and introduce them to the first mass analyzer. For example, for in GC-MS/MS, GAS CHROMATOGRAPHY-MASS SPECTROMETRY is involved in separating relatively small compounds by GAS CHROMATOGRAPHY prior to injecting them into an ionization chamber for the mass selection.
Preferred term Tandem Mass Spectrometry
Entry term(s) Mass Spectrometry Mass Spectrometry
Mass Spectrometry, Tandem
Mass Spectrometry-Mass Spectrometry



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