E/2 mass spectrum: Difference between revisions

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Processes of the charge-stripping type  
Processes of the [[charge-stripping]] type  




that occur in a collision cell (containing a gas, N) 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 E is set to half the value required to transmit the main ion-beam, the only ions to be transmitted will be those with a kinetic energy-to-charge ratio half that of the main ion-beam. The product ions of the charge-stripping process fulfil this condition. If the magnetic field B is scanned, a mass spectrum of such doubly charged product ions, and thus their singly charged precursors, is obtained. Such a spectrum is called an E/2 mass spectrum. Interference from product ions from processes of the type  
that occur in a collision cell (containing a gas, N) 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 E is set to half the value required to transmit the main ion-beam, the only ions to be transmitted will be those with a kinetic energy-to-charge ratio half that of the main ion-beam. The [[product ion]]s of the [[charge-stripping]] process fulfil this condition. If the magnetic field B is scanned, a [[mass spectrum]] of such doubly charged [[product ion]]s, and thus their singly charged precursors, is obtained. Such a spectrum is called an E/2 mass spectrum. Interference from [[product ion]]s from processes of the type  




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== Related Terms ==
== Related Terms ==


[[2e Mass Spectrum]]
*[[2e Mass Spectrum]]


[[Category:Reactions]]
[[Category:Reactions]]


[[Category:Sequential m/z Separation]]
[[Category:Sequential m/z Separation]]

Revision as of 17:51, 1 December 2005