E/2 mass spectrum: Difference between revisions
m moved E/2 Mass Spectrum to E/2 mass spectrum |
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== | == Orange Book Entry == | ||
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M<sup>2</sup><sup>+</sup> + X → M<sup>+</sup> + X<sup>+</sup> | M<sup>2</sup><sup>+</sup> + X → M<sup>+</sup> + X<sup>+</sup> | ||
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Processes of the charge-stripping type: M<sup>+</sup> + X → M<sup>2+</sup> + X + e occurring in [[Collision Cell|collision cell]] (containing gas X) located in a [[Field Free Region|field-free region]] preceding a [[Magnetic Sector|magnetic]] and [[Electric Sector|electric sector]] combination placed in either order, may be detected as follows;- if the instrument slits are wide and if the [[Electric Sector|electric sector]] field is set to half the value required to transmit the main ion beam, the only ions [[Transmission|transmitted]] will be those with [[Kinetic Energy|kinetic energy]]/charge ratio half, or almost half, that of the main ion beam. The [[Product Ion|product ion]]s of the above [[Charge Stripping Reaction|charge stripping]] process fulfil that condition. If the magnetic field, B, is scanned, a [[mass spectrum]] of such doubly-charged product ions and thus of their singly-charged precursors is obtained. Such a spectrum is termed a E/2 mass spectrum. | Processes of the charge-stripping type: M<sup>+</sup> + X → M<sup>2+</sup> + X + e occurring in [[Collision Cell|collision cell]] (containing gas X) located in a [[Field Free Region|field-free region]] preceding a [[Magnetic Sector|magnetic]] and [[Electric Sector|electric sector]] combination placed in either order, may be detected as follows;- if the instrument slits are wide and if the [[Electric Sector|electric sector]] field is set to half the value required to transmit the main ion beam, the only ions [[Transmission|transmitted]] will be those with [[Kinetic Energy|kinetic energy]]/charge ratio half, or almost half, that of the main ion beam. The [[Product Ion|product ion]]s of the above [[Charge Stripping Reaction|charge stripping]] process fulfil that condition. If the magnetic field, B, is scanned, a [[mass spectrum]] of such doubly-charged product ions and thus of their singly-charged precursors is obtained. Such a spectrum is termed a E/2 mass spectrum. | ||
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== | == See also == | ||
*[[2e Mass Spectrum]] | *[[2e Mass Spectrum]] | ||
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[[Category:Sequential m/z Separation]] | [[Category:Sequential m/z Separation]] | ||
{{DEFAULTSORT:E/2 Mass Spectrum}} | |||
Revision as of 14:39, 12 July 2009
Obsolete Template
Orange Book Entry
Orange Book
| ORANGE BOOK DEFINITION
IUPAC. Analytical Division. Compendium of Analytical Nomenclature (the Orange Book). Definitive Rules, 1979 (see also Orange Book 2023) |
| E/2 mass spectrum |
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M2+ + X → M+ + X+ Processes of the charge-stripping type: M+ + X → M2+ + X + e occurring in collision cell (containing gas X) located in a field-free region preceding a magnetic and electric sector combination placed in either order, may be detected as follows;- if the instrument slits are wide and if the electric sector field is set to half the value required to transmit the main ion beam, the only ions transmitted will be those with kinetic energy/charge ratio half, or almost half, that of the main ion beam. The product ions of the above charge stripping process fulfil that condition. If the magnetic field, B, is scanned, a mass spectrum of such doubly-charged product ions and thus of their singly-charged precursors is obtained. Such a spectrum is termed a E/2 mass spectrum. |
| IUPAC 1997 Orange Book Chapter 12 |
| Index of Orange Book Terms |
