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FRAGMENT ION [6 records]
Record 1 - internal organization data 2025-05-13
Record 1, English
Record 1, Subject field(s)
- Physics
- Analytical Chemistry
Record 1, Main entry term, English
- electrospray ionization
1, record 1, English, electrospray%20ionization
correct, noun
Record 1, Abbreviations, English
- ESI 2, record 1, English, ESI
correct, noun
Record 1, Synonyms, English
- electrospray ionisation 3, record 1, English, electrospray%20ionisation
correct, noun
- ESI 3, record 1, English, ESI
correct, noun
- ESI 3, record 1, English, ESI
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
Electrospray ionization(ESI) is a technique to generate ions for mass spectrometry using electrospray by applying a high voltage to a liquid to produce an aerosol.... ESI overcomes the tendency of [the] molecules to fragment upon ionization.... ESI applies a high voltage at the outlet of the capillary, and the high electric field generated atomizes the liquid flowing out of the capillary into tiny charged droplets. As the solvent evaporates, the charge intensity on the surface of the droplet gradually increases, and finally the droplet splits into one or a plurality of charged ions, allowing the analyte to enter the gas phase in the form of a single charge or multiple charges and become a gas phase ion. 1, record 1, English, - electrospray%20ionization
Record number: 1, Textual support number: 1 OBS
A key difference between APCI [atmospheric pressure chemical ionization] and ESI is that ESI is based on ions that are formed in solution, whereas APCI uses ions that are formed in the gas phase. 4, record 1, English, - electrospray%20ionization
Record 1, Key term(s)
- electro-spray ionization
- electro-spray ionisation
Record 1, French
Record 1, Domaine(s)
- Physique
- Chimie analytique
Record 1, Main entry term, French
- ionisation par électronébulisation
1, record 1, French, ionisation%20par%20%C3%A9lectron%C3%A9bulisation
correct, feminine noun
Record 1, Abbreviations, French
- ESI 1, record 1, French, ESI
feminine noun
Record 1, Synonyms, French
- ionisation par électronébuliseur 2, record 1, French, ionisation%20par%20%C3%A9lectron%C3%A9buliseur
correct, feminine noun
- ESI 2, record 1, French, ESI
feminine noun
- ESI 2, record 1, French, ESI
- ionisation par électronébulisateur 3, record 1, French, ionisation%20par%20%C3%A9lectron%C3%A9bulisateur
correct, feminine noun
- ESI 3, record 1, French, ESI
feminine noun
- ESI 3, record 1, French, ESI
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
Ionisation par électronébulisation [...] Lors de l'ionisation, un flux continu de la solution d'échantillons passe à travers un capillaire maintenu à une tension élevée [...] Lorsqu'un potentiel positif ou négatif est appliqué sur l'échantillon, l'interface liquide-air se polarise avec un excès de charges. Une forme quasi conique est observée à la surface du capillaire résultant d'un équilibre entre les forces électrostatiques de la couche ionique et la tension superficielle [...] Lorsqu'un équilibre parfait est atteint, la surface devient conique, formant le cône de Taylor (limite de Rayleigh) [...] Une augmentation du potentiel appliqué disloque l'interface liquide-air au sommet du cône dû à une tension superficielle trop faible. La solution est dispersée sous forme de gouttelettes chargées positivement ou négativement [...] Une température élevée de la source et/ou un flux d'azote gazeux permettent l'évaporation du solvant, diminuant la taille des gouttelettes et augmentant la densité de charges de surface. Lorsque la répulsion coulombienne dépasse la tension de surface, les ions sont éjectés dans leur phase gazeuse [...] 4, record 1, French, - ionisation%20par%20%C3%A9lectron%C3%A9bulisation
Record number: 1, Textual support number: 1 OBS
ESI : L'abréviation «ESI» provient du terme anglais «electrospray ionization». 5, record 1, French, - ionisation%20par%20%C3%A9lectron%C3%A9bulisation
Record 1, Key term(s)
- ionisation par électro-nébulisation
- ionisation par électro-nébuliseur
- ionisation par électro-nébulisateur
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 1998-02-16
Record 2, English
Record 2, Subject field(s)
- Chemistry
Record 2, Main entry term, English
- appearance energy
1, record 2, English, appearance%20energy
correct
Record 2, Abbreviations, English
Record 2, Synonyms, English
- appearance potential 2, record 2, English, appearance%20potential
avoid
Record 2, Textual support, English
Record number: 2, Textual support number: 1 DEF
The lowest energy which must be imparted to the parent molecule to cause it to produce a particular specified fragment ion. This energy, usually stated in electron volts, may be imparted by electron impact, by photon impact, or in other ways. 1, record 2, English, - appearance%20energy
Record 2, French
Record 2, Domaine(s)
- Chimie
Record 2, Main entry term, French
- énergie d'apparition
1, record 2, French, %C3%A9nergie%20d%27apparition
correct, feminine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
- potentiel d'apparition 1, record 2, French, potentiel%20d%27apparition
avoid, masculine noun
Record 2, Textual support, French
Record number: 2, Textual support number: 1 DEF
[...] énergie la plus faible qu'il faut fournir au composé parent pour qu'il produise un ion fragment donné défini. Cette énergie, habituellement indiquée en électron-volts, peut être fournie par impact électronique, impact photonique ou d'une autre façon. 1, record 2, French, - %C3%A9nergie%20d%27apparition
Record 2, Spanish
Record 2, Textual support, Spanish
Record 3 - internal organization data 1998-02-09
Record 3, English
Record 3, Subject field(s)
- Chemistry
Record 3, Main entry term, English
- parent ion
1, record 3, English, parent%20ion
correct, see observation
Record 3, Abbreviations, English
Record 3, Synonyms, English
Record 3, Textual support, English
Record number: 3, Textual support number: 1 DEF
[In mass spectrometry], the ion precursor of a fragment ion. The term refers to any ion that undergoes fragmentation... 1, record 3, English, - parent%20ion
Record number: 3, Textual support number: 1 OBS
The term ... is not interchangeable with molecular ion. 1, record 3, English, - parent%20ion
Record 3, French
Record 3, Domaine(s)
- Chimie
Record 3, Main entry term, French
- ion parent
1, record 3, French, ion%20parent
correct, see observation, masculine noun
Record 3, Abbreviations, French
Record 3, Synonyms, French
Record 3, Textual support, French
Record number: 3, Textual support number: 1 DEF
[En spectrométrie de masse], [...] ion précurseur d'un ion fragment ou d'un ion intermédiaire métastable. Il est clair que l'expression est applicable à tout ion pouvant subir une fragmentation. 1, record 3, French, - ion%20parent
Record number: 3, Textual support number: 1 OBS
L'expression n'est pas interchangeable avec ion moléculaire. 1, record 3, French, - ion%20parent
Record 3, Spanish
Record 3, Textual support, Spanish
Record 4 - internal organization data 1998-02-05
Record 4, English
Record 4, Subject field(s)
- Chemistry
Record 4, Main entry term, English
- precursor ion
1, record 4, English, precursor%20ion
correct
Record 4, Abbreviations, English
Record 4, Synonyms, English
- progenitor ion 1, record 4, English, progenitor%20ion
correct
Record 4, Textual support, English
Record number: 4, Textual support number: 1 DEF
[In mass spectrometry], the precursor or progenitor of a fragment ion or of a metastable intermediate. 1, record 4, English, - precursor%20ion
Record 4, French
Record 4, Domaine(s)
- Chimie
Record 4, Main entry term, French
- ion précurseur
1, record 4, French, ion%20pr%C3%A9curseur
correct, masculine noun
Record 4, Abbreviations, French
Record 4, Synonyms, French
- ion progéniteur 1, record 4, French, ion%20prog%C3%A9niteur
correct, masculine noun
Record 4, Textual support, French
Record number: 4, Textual support number: 1 DEF
[En spectrométrie de masse], [...] précurseur d'un ion fragment ou d'un intermédiaire métastable. 1, record 4, French, - ion%20pr%C3%A9curseur
Record number: 4, Textual support number: 1 OBS
Un fragment d'ion peut lui-même être le précurseur («progéniteur») d'autres fragments. 1, record 4, French, - ion%20pr%C3%A9curseur
Record 4, Spanish
Record 4, Textual support, Spanish
Record 5 - internal organization data 1998-02-05
Record 5, English
Record 5, Subject field(s)
- Chemistry
Record 5, Main entry term, English
- principal ion
1, record 5, English, principal%20ion
correct
Record 5, Abbreviations, English
Record 5, Synonyms, English
Record 5, Textual support, English
Record number: 5, Textual support number: 1 DEF
[In mass spectroscopy], a molecular or fragment ion made up of the most abundant isotopes of each of its atomic constituents. 1, record 5, English, - principal%20ion
Record number: 5, Textual support number: 1 OBS
In the case of compounds that have been artificially isotopically enriched in one or more positions ... the principal ion may be defined by treating the heavy isotopes as new atomic species. 1, record 5, English, - principal%20ion
Record 5, French
Record 5, Domaine(s)
- Chimie
Record 5, Main entry term, French
- ion principal
1, record 5, French, ion%20principal
correct, masculine noun
Record 5, Abbreviations, French
Record 5, Synonyms, French
Record 5, Textual support, French
Record number: 5, Textual support number: 1 DEF
[En spectroscopie de masse], [...] ion moléculaire ou [...] ion fragment constitué des isotopes les plus abondants de chacun de ses constituants atomiques. 1, record 5, French, - ion%20principal
Record number: 5, Textual support number: 1 OBS
Dans le cas de composés ayant isotopiquement été enrichis artificiellement dans une ou plusieurs positions; [...] l'ion principal doit être défini en considérant les isotopes lourds comme de nouvelles espèces atomiques. 1, record 5, French, - ion%20principal
Record 5, Spanish
Record 5, Textual support, Spanish
Record 6 - internal organization data 1997-09-10
Record 6, English
Record 6, Subject field(s)
- Chemistry
Record 6, Main entry term, English
- metastable ion decomposition
1, record 6, English, metastable%20ion%20decomposition
correct
Record 6, Abbreviations, English
Record 6, Synonyms, English
Record 6, Textual support, English
Record number: 6, Textual support number: 1 DEF
[In mass spectrometry], the decomposition of an ion of mass [m subscript 1] into an ion of mass m2(m2 < m1) occurring during the passage of the ion through the mass spectrometer. The decomposition is on a time-scale longer than that generating a normal fragment ion. 1, record 6, English, - metastable%20ion%20decomposition
Record 6, French
Record 6, Domaine(s)
- Chimie
Record 6, Main entry term, French
- décomposition d'ion métastable
1, record 6, French, d%C3%A9composition%20d%27ion%20m%C3%A9tastable
correct, feminine noun
Record 6, Abbreviations, French
Record 6, Synonyms, French
Record 6, Textual support, French
Record number: 6, Textual support number: 1 DEF
[En spectrométrie de masse], la décomposition d'un ion de masse m1 en un ion de masse m2 recueilli au collecteur (m2 < m1) se produisant après l'extraction de l'ion de masse m1 de la source et durant le passage de l'ion à travers le spectromètre de masse. Cette décomposition se produit à une échelle de temps de beaucoup supérieure à celle qui conduit à un ion fragment normal. 1, record 6, French, - d%C3%A9composition%20d%27ion%20m%C3%A9tastable
Record 6, Spanish
Record 6, Textual support, Spanish
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