Collision-energy ramp. A modification to an RF-only quadrupole collision cell

1990 ◽  
Vol 4 (9) ◽  
pp. 341-344 ◽  
Author(s):  
Geoffrey Bott ◽  
Sherri Ogden ◽  
Julie A. Leary
Keyword(s):  
Collision Energy ◽  
Collision Cell ◽  
Quadrupole Collision Cell

Collisionally activated dissociation: Effect of collision energy and collision cell pressure

1990 ◽  
Vol 19 (2) ◽  
pp. 94-96 ◽  
Author(s):  
Horst Schweer ◽  
Gerhard Mackert ◽  
Hannsjörg W. Seyberth
Keyword(s):  
Collision Energy ◽  
Collision Cell ◽  
Collisionally Activated Dissociation

Ion dissociation reactions induced in a high-pressure quadrupole collision cell

1995 ◽  
Vol 9 (14) ◽  
pp. 1366-1375 ◽  
Author(s):  
Kevin Whalen ◽  
J. Stuart Grossert ◽  
Robert K. Boyd
Keyword(s):  
High Pressure ◽  
Collision Cell ◽  
Ion Dissociation ◽  
Quadrupole Collision Cell

Reactive collisions in quadrupole cells. 6. H/D exchange reactions of protonated alkylbenzenes with D2O, CH3OD, and C2H5OD

1995 ◽  
Vol 73 (11) ◽  
pp. 1779-1784 ◽  
Author(s):  
Jinsong Ni ◽  
Alex. G. Harrison
Keyword(s):  
Mass Spectrometer ◽  
Alkyl Group ◽  
Collision Cell ◽  
Tandem Mass ◽  
Exchange Reactions ◽  
Deuterium Incorporation ◽  
Tandem Mass Spectrometer ◽  
Quadrupole Collision Cell ◽  
Reactive Collisions

The H/D exchange reactions occurring on collision of protonated alkylbenzenes with C2H5OD, CH3OD, and D2O at low collision energies in the quadrupole collision cell of a hybrid tandem mass spectrometer have been studied for 22 alkylbenzenes. The exchange reactions with D2O are much less efficient than the exchange reactions with C2H5OD or CH3OD; this difference is rationalized on energetics grounds. The H/D exchange of the protonated alkylbenzenes with C2H5OD or CH3OD leads, typically, to 40–70% deuterium incorporation in the protonated alkylbenzene and, for most cases, to significant ion signals corresponding to exchange of the added hydrogen and the aromatic hydrogens. Thus, the method is a feasible approach to counting the number of aromatic hydrogens in alkylbenzenes. The extent of exchange decreases with increasing size of the alkyl group in monoalkylbenzenes for reasons that are not readily understood. Keywords: protonated alkylbenzenes, H/D exchange, reactive collisions.

Hill’s equation applied to quadrupole collision cell design

1992 ◽  
Vol 439 (1907) ◽  
pp. 627-636 ◽  
Keyword(s):  
Collision Cell ◽  
Cell Design ◽  
Hill’S Equation ◽  
Triangular Wave ◽  
Square Wave ◽  
Hill's Equation ◽  
Quadrupole Collision Cell

This paper describes the investigation of the square wave, triangular wave and sawtooth Hill equations, with the object of finding properties that enhance the performance of quadrupole collision cells. The mathematical findings and their design implications are discussed.

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