Difference between revisions of "Linked scan at constant B/E"

From MS Terms Wiki
Jump to navigation Jump to search
(for John Langley)
 
 
(11 intermediate revisions by 2 users not shown)
Line 1: Line 1:
{{DefName|
+
{{Def|
A linked scan at constant B/E may be performed on a sector instrument that incorporates at least one magnetic sector plus one electric sector. It involves scanning the magnetic sector field-strength (B) and the electric sector field-strength (E) simultaneously, holding the accelerating voltage (V) constant, so as to maintain the ratio of the two fields strengths which transmit main-beam ions of predetermined mass-to-charge ratio. These pre-selected main-beam ions are the precursor ions whose fragment-ion spectrum is required. The fragmentation reactions observed occur in a field-free region traversed before the two sectors scanned in this way.
+
ref={{ob}}
This term "B/E linked scan" is not recommended; it may suggest that the ratio B/E varies during the scan.
+
|rel=[[Linked scan]]
 
}}
 
}}
  
== [[Orange Book]] Entry ==
+
<!-- Orange Book -->
 
+
{{orange|
This can be performed with a sector instrument incorporating at least one magnetic sector and one electric sector. The magnetic sector field strength, B, and the electric sector field strength, E, are scanned simultaneously, while holding the accelerating voltage, V, constant, so as to maintain the ratio B/E constant. This constant value is determined by the ratio of the two field strengths required to transmit main-beam ions of predetermined mass/charge ratio. These preselected main-beam ions are the precursor ions whose fragment ion spectrum is required. The term B/E linked scan is not recommended.
+
This can be performed with a [[sector instrument]] incorporating at least one [[magnetic sector]] and one [[electric sector]]. The magnetic sector field strength, B, and the electric sector field strength, E, are scanned simultaneously, while holding the accelerating voltage, V, constant, so as to maintain the ratio B/E constant. This constant value is determined by the ratio of the two field strengths required to transmit main-beam ions of predetermined mass/charge ratio. These preselected main-beam ions are the precursor ions whose fragment ion spectrum is required. The term B/E linked scan is not recommended.
 
+
}}
  
 
[[Category:Sequential m/z Separation]]
 
[[Category:Sequential m/z Separation]]

Latest revision as of 16:46, 4 April 2014

DRAFT DEFINITION
Linked scan at constant B/E
Related Term(s): Linked scan
Reference(s):

IUPAC. Analytical Division. Compendium of Analytical Nomenclature (the Orange Book). Definitive Rules, 1979. Compiled by J. Inczédy, T. Lengyel, A. M. Ure. Blackwell Scientific Publications, Oxford (1997). On-line corrected version: http://www.iupac.org /publications/analytical compendium (2000).

This is an unofficial draft definition presented for information and comment.

Recommended terms | Full list of terms

 

Orange Book

ORANGE BOOK DEFINITION

IUPAC. Analytical Division. Compendium of Analytical Nomenclature (the Orange Book). Definitive Rules, 1979.

Linked scan at constant B/E

This can be performed with a sector instrument incorporating at least one magnetic sector and one electric sector. The magnetic sector field strength, B, and the electric sector field strength, E, are scanned simultaneously, while holding the accelerating voltage, V, constant, so as to maintain the ratio B/E constant. This constant value is determined by the ratio of the two field strengths required to transmit main-beam ions of predetermined mass/charge ratio. These preselected main-beam ions are the precursor ions whose fragment ion spectrum is required. The term B/E linked scan is not recommended.

IUPAC 1997 Orange Book Chapter 12
Index of Orange Book Terms