Linked scan at constant B2/E: Difference between revisions

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A linked scan at constant B<sup>2</sup>/E may be performed on a [[sector instrument]] that incorporates at least one [[electric sector]] plus one [[magnetic sector]]. It involves holding the [[Accelerating Voltage|accelerating voltage]] fixed and scanning the magnetic field (B) and the electric field (E) simultaneously so as to maintain the ratio B<sup>2</sup>/E at a constant value. This constant value corresponds to the ratio of the two fields which transmit main-beam ions of predetermined mass-to-charge ratio; these pre-selected main-beam ions are the fragment ions whose precursor ion spectrum is required. The fragmentation reactions thus observed occur in a [[FFR|field-free region]] traversed before the two sectors scanned in this way. This term should not be used without prior explanation of the meanings of B and E.  
A [[linked scan]] at constant B<sup>2</sup>/E may be performed on a [[sector mass spectrometer]] that incorporates at least one [[electric sector]] plus one [[magnetic sector]] in either order. The [[accelerating voltage]] is fixed and the magnetic field, B, and the electric field, E, are scanned simultaneously so as to maintain the ratio B<sup>2</sup>/E at a constant value. This [[linked scan]] records a [[precursor ion spectrum]] of dissociation or other reactions occurring in the [[field free region]] (FFR) preceding the two sectors.
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== Related Terms ==
 
*[[Linked Scan]]


The term "[[B2/E Linked Scan|B<sup>2</sup>/E linked scan]]" is not recommended.
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[[Category:Sequential m/z Separation]]
[[Category:Sequential m/z Separation]]

Revision as of 00:59, 14 December 2005

DRAFT DEFINITION
Linked scan at constant B2/E

A linked scan at constant B2/E may be performed on a sector mass spectrometer that incorporates at least one electric sector plus one magnetic sector in either order. The accelerating voltage is fixed and the magnetic field, B, and the electric field, E, are scanned simultaneously so as to maintain the ratio B2/E at a constant value. This linked scan records a precursor ion spectrum of dissociation or other reactions occurring in the field free region (FFR) preceding the two sectors.

Considered between 2004 and 2006 but not included in the 2006 PAC submission
This is an unofficial draft definition presented for information and comment.

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