2 edition of development of a QEB tandem mass spectrometer for the study of ion-molecule reactions found in the catalog.
development of a QEB tandem mass spectrometer for the study of ion-molecule reactions
Thesis (Ph.D.) - University of Warwick, 1994.
|Statement||by Hok-Ming Liu.|
The 3D quadrupole ion trap mass spectrometer as a complete chemical laboratory for fundamental gas-phase studies of metal mediated chemistry. O'Hair RA(1). Author information: (1)School of Chemistry, University of Melbourne, Melbourne, Victoria , Australia. [email protected] mass spectrometer’s transfer optics to increase or decrease clustering can be modiﬁed rapidly (1min). The ion molecule reactor and ra-dioactive source used for water cluster, iodide, CF3O, and.
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These limitations stimulated development of new instruments which were specially designed for the study of ion-molecule reactions. Tandem mass spectrometers, flowing afterglow instruments and the ion cyclotron resonance (ICR) mass spectrometer are three examples of powerful new instuOeats which bypass many of these problems.-In this paper we Cited by: A high pressure trapped-ion mass spectrometer for the study of ion—molecule reactions is described.
Ion trapping results from the combined action of electric and magnetic fields. Typical trapping times are 1 msec and pressures can exceed 10 −2 torr. Average ion energies are generally less than 1 eV and thermal energies can be by: Black canyons for ions stored in an ion-trap mass spectrometer.
Rapid Communications in Mass Spectrometry6 (9), DOI: /rcm R. Cooks, K. Cox, J. Williams. High-performance mass spectrometry with the ion trap mass by: The study of gas phase ion-molecule reactions has been greatly facilitated in recent years by the rapid development of tandem mass spectrometry (MS/MS).
Originally promoted as a method for analysis of complex mixtures, MS/MS is now also used to determine ion structure, as well as reaction cross sections, thermodynamics, and by: 3.
Apparatus has been developed for the mass spectrographic study of ion‐molecule reactions occurring under gas‐kinetic conditions.
Ions are produced by electron bombardment inside a long drift tube containing gas at a pressure of up to about torr.
The ions diffuse down the drift tube under the influence of a weak electric field. 96 M. Welling et aL/International Journal of Mass Spectrometry and Ion Processes () theoretical understanding of ion-molecule pro- cesses in these areas has resulted in a need for data to be used in the development of models.
Abstract. The use of tandem mass spectrometers as an experimental tool and the type of information derived from such studies are closely related to the crossed-beam studies of these reactions discussed by Herman and Wolfgang in Chap to the charge-exchange studies Lindholm discussed in Chap and to the ion cyclotron resonance technique described by Henis in Chapter 9.
The purpose of this thesis is to investigate the ion/molecule reactions of silver cluster cations with crown ether. For observing the reactions, a cylindrical ion trap time-of-ﬂight (TOF) mass spectrometer was constructed.
Some preliminary tests and the observations of. Request PDF | Ion-molecule adduct formation in tandem mass spectrometry | Nowadays most LC-MS methods rely on tandem mass spectrometry not only for quantitation and.
Mass-Spectrometric Study on Ion-Molecule Reactions of CF3+ with PhX (X = F, Cl, Br, I) at Near-Thermal Energies Article (PDF Available) in Bulletin of the Chemical Society of Japan 70(5) Structurally diagnostic ion-molecule reactions and collisionally activated dissociation of 1,4-benzodiazepines in a quadrupole ion trap mass spectrometer.
Analytical Chemistry65 (17), DOI: /aca Randall K. Julian and R. Graham. Cooks. The biomolecular ions are produced by an electrospray ionization source, mass-over-charge selected, accumulated in a 3D ion trap, and then guided to the extraction region of an orthogonal time-of-flight mass spectrometer.
Here, the target molecular ions interact with a keV atomic ion beam produced by an electron cyclotron resonance ion source.
phase ion-molecule reactions compared to most other tandem mass spectrometers. The ion trap, a tandem-in-time instrument, performs each stage of mass spectrometry in the same volume of space with each analysis step separated in time.
ICP-MS instruments that use ion-molecule reactions to overcome spectral overlaps are becoming more widely available. Strategies to develop methods that use ion-molecule reactions in a quadrupole reaction cell are systematically described. Ion-molecule reactions may be used to remove the spectral overlap ion so that the analyte elemental ion can be measured with little background.
ESI mass spectra. The contents of the solvent spray, the gas flow rate, the amount of applied voltage, the spray angle and the ion uptake angle, as well as the various distances in aligning the spray, sample and mass spectrometer are all variables which can be studied to achieve an optimal mass spectrum for a particular type of sample.
TANDEM MASS SPECTROMETRY AND COMPUTATIONAL CHEMISTRY OF ELUSIVE ORGANIC IONS AND NEUTRALS IN THE GAS PHASE. Tandem mass spectrometry and computational chemistry of elusive organic ions and neutrals in the and the mechanisms of these reactions were studied using tandem mass spectrometric experiments and CBS-QB3 model chemistry.
The. A commercial quadrupole/time-of-flight (QqTOF) tandem mass spectrometer has been adapted for ion/ion reaction studies. To enable mutual storage of oppositely charged ions in a linear ion trap, the oscillating quadrupole field of the second quadrupole of the system (Q2) serves to store ions in the radial dimension while auxiliary RF is superposed on the end lenses of Q2 during the reaction.
A Novel Ion Trap Based Tandem Mass Spectrometer for the Spectroscopic Study of Cold Gas Phase Polyatomic Ions: I.K. Webb, M. Mentinova, W.M. McGee, S.A. McLuckey, J. Soc. Mass Spectrom., 24 () Gas-Phase Intramolecular Protein Crosslinking via Ion/Ion Reactions: Ubiquitin and a Homobifunctional sulfo-NHS Ester: methods reﬂect the outcome of complex ion/molecule reactions taking place in the respective ionization method.
Thus, fundamental knowledge on the ion/molecule reactions is indispensable to make the mass spectrometry as the superb analytical technique. In this chapter, the fundamentals of ion/molecule reactions will be described. concluded that the ion-molecule reactions produced both ion structures, but in different halogen-dependent proportions.
For (C2H5)&l* ions, 2 is the major species, for (C,H,),Br+ both l- and Z-type ions are generated, whereas for (C,H,),l+ the classical form 1 must be the predominant structure.associative ion-molecule reactions and ion trapping with a triple quadrupole mass spectrometer by anthony peter annacchino, jr.
dissertation presented to the graduate school the university of florida in partial fulfillment of the requirements for the degree of doctor of philosophy university of florida to my family with love.
acknowledgements would.A mass spectrometric method utilizing gas-phase ion/molecule reactions of 2-methoxypropene (MOP) has been developed for the identification of the sulfoxide functionality in protonated analytes in a LQIT mass spectrometer.
Protonated sulfoxide analytes react with .