A VERY HIGH YIELD ELECTRON IMPACT ION SOURCE FOR QUADRUPOLE MASS SPECTROMETRY.

Persistent Link:
http://hdl.handle.net/10150/187621
Title:
A VERY HIGH YIELD ELECTRON IMPACT ION SOURCE FOR QUADRUPOLE MASS SPECTROMETRY.
Author:
KOONTZ, STEVEN LOWELL
Issue Date:
1983
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
Operational characteristics and performance of two mass spectrometers incorporating improved versions of the Very High Yield Electron Impact (VHY-EI) ion source are described. The ionizers are designed around a large volume, low pressure, hot cathode Penning geometry and operate at source pressures of 10⁻⁵ torr and below. In combination with low spherical aberration focusing optics, mass analyzed ion currents 100 to 1000 times more intense than those produced by conventional ionizers operated under identical or comparable conditions of resolution, analyzer type, sample pressure, and electron impact energy are obtained. In addition, high ionization-mass analysis efficiencies have been demonstrated for a variety of organic compounds with sample mass flow rates approaching 1 mg/min. Typical electron impact spectra are obtained with no evidence of pyrolysis or ion molecule reactions. Unusually intense spectra can be produced with low energy electrons.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Ion sources.; Mass spectrometry.; Quadrupoles.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Chemistry; Graduate College
Degree Grantor:
University of Arizona

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleA VERY HIGH YIELD ELECTRON IMPACT ION SOURCE FOR QUADRUPOLE MASS SPECTROMETRY.en_US
dc.creatorKOONTZ, STEVEN LOWELLen_US
dc.contributor.authorKOONTZ, STEVEN LOWELLen_US
dc.date.issued1983en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractOperational characteristics and performance of two mass spectrometers incorporating improved versions of the Very High Yield Electron Impact (VHY-EI) ion source are described. The ionizers are designed around a large volume, low pressure, hot cathode Penning geometry and operate at source pressures of 10⁻⁵ torr and below. In combination with low spherical aberration focusing optics, mass analyzed ion currents 100 to 1000 times more intense than those produced by conventional ionizers operated under identical or comparable conditions of resolution, analyzer type, sample pressure, and electron impact energy are obtained. In addition, high ionization-mass analysis efficiencies have been demonstrated for a variety of organic compounds with sample mass flow rates approaching 1 mg/min. Typical electron impact spectra are obtained with no evidence of pyrolysis or ion molecule reactions. Unusually intense spectra can be produced with low energy electrons.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectIon sources.en_US
dc.subjectMass spectrometry.en_US
dc.subjectQuadrupoles.en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineChemistryen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.identifier.proquest8405501en_US
dc.identifier.oclc690667573en_US
All Items in UA Campus Repository are protected by copyright, with all rights reserved, unless otherwise indicated.