Difference between revisions of "Linked scan at constant B(1-(E/E0))1/2/E"

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Linked Scan at Constant B[1-(E/E<sub>0</sub>)]<sup>1/2</sup>/E
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A [[linked scan]] performed on a [[sector instrument]] that incorporates at least one [[electric sector]] plus one [[magnetic sector]] placed in either order. The [[accelerating voltage]] is fixed while scanning the magnetic field, B, and electric field, E, simultaneously, so as to maintain the quantity B[1-(E/E<sub>0</sub>)]<sup>1/2</sup>/E at a constant value. This [[linked scan]] records a [[constant neutral mass loss (or gain) spectrum]] of dissociation or other reactions occurring in a [[field free region]] preceding the two sectors. E<sub>0</sub> is the electric field required to transmit the singly charged analog of the desired neutral fragment.
 
 
 
The term ''B[1-(E/E<sub>0</sub>)]1/2/E linked scan" is deprecated.
 
 
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This can be performed with a sector instrument incorporating at least one electric sector plus one magnetic 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 [1- (E /E 0)]1/2 /E constant. This constant value is equal to B3/E0, where E0 and B3 are respectively the electric and magnetic sector fields required to transmit M3+ ions in the main ion beam; m3 represents the mass (m1-m2) of the selected neutral fragment M3 whose precursor spectrum is required. The fragmentation reactions thus observed occur in a field-free region traversed before the two sectors scanned in this way. The term 'B [1- (E /E 0)]1/2/E linked scanis not recommended.
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This can be performed with a [[sector instrument]] incorporating at least one [[electric sector]] plus one [[magnetic 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 [1- (E /E 0)]1/2 /E constant. This constant value is equal to B3/E0, where E0 and B3 are respectively the electric and magnetic sector fields required to transmit M3+ ions in the main ion beam; m3 represents the mass (m1-m2) of the selected neutral fragment M3 whose precursor spectrum is required. The fragmentation reactions thus observed occur in a field-free region traversed before the two sectors scanned in this way. The term 'B [1- (E /E 0)]1/2/E linked scan is not recommended.
 
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[[Category:Sequential m/z Separation]]
 
[[Category:Sequential m/z Separation]]
 
{{DEFAULTSORT:Linked Scan At Constant B(1-(E/E0))1/2/E}}
 
{{DEFAULTSORT:Linked Scan At Constant B(1-(E/E0))1/2/E}}

Latest revision as of 16:52, 4 April 2014

DRAFT DEFINITION
Linked scan at constant B(1-(E/E0))1/2/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(1-(E/E0))1/2/E

This can be performed with a sector instrument incorporating at least one electric sector plus one magnetic 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 [1- (E /E 0)]1/2 /E constant. This constant value is equal to B3/E0, where E0 and B3 are respectively the electric and magnetic sector fields required to transmit M3+ ions in the main ion beam; m3 represents the mass (m1-m2) of the selected neutral fragment M3 whose precursor spectrum is required. The fragmentation reactions thus observed occur in a field-free region traversed before the two sectors scanned in this way. The term 'B [1- (E /E 0)]1/2/E linked scan is not recommended.

IUPAC 1997 Orange Book Chapter 12
Index of Orange Book Terms