Effect of mobile phase additives on linearity in particle beam lc/ms

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dc.contributor.authorPerry, Mary Lauraen
dc.contributor.departmentChemistryen
dc.date.accessioned2014-03-14T21:48:02Zen
dc.date.adate2009-10-22en
dc.date.available2014-03-14T21:48:02Zen
dc.date.issued1991en
dc.date.rdate2009-10-22en
dc.date.sdate2009-10-22en
dc.description.abstractAlthough Particle Beam Liquid Chromatography/Mass Spectrometry (PB LC/MS) has been shown to be useful for the identification and confirmation of nonvolatile and thermally labile compounds, evidence has been reported of response nonlinearity at low concentrations. Addition of a mobile phase additive to the HPLC mobile phase improves the linearity via a so-called "carrier effect.” A study has been done to characterize the physical and chemical phenomena involved in this carrier effect. A matrix of probes and additives were combined at 9 levels (2-1000ng) while Single Ion Monitoring (SIM) monitored the effectiveness of each additive on linearity and sensitivity. Next, the pH and concentration of the additive were varied for the 24 sample probes, ranging from pharmaceutical to environmental samples. Data is provided demonstrating the statistical effect on quantitative performance for each study. Analytical examples are shown. A mathematical model has been applied to account for the nonlinearity of PB LC/MS. For a given droplet distribution, reducing the concentration of the analyte results in reduced particle size. Application of a high pass filter to a particle distribution replicates response factor and signal obtained by PB LC/MS. In addition, a mathematical model representing the linear response upon addition of a nonvolatile buffer has been successfully applied. Graphs are presented showing the feasibility of this model.en
dc.description.degreeMaster of Scienceen
dc.format.extentxi, 144 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-10222009-125123en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-10222009-125123/en
dc.identifier.urihttp://hdl.handle.net/10919/45260en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1991.P477.pdfen
dc.relation.isformatofOCLC# 24111866en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1991.P477en
dc.subject.lcshParticle beams -- Researchen
dc.titleEffect of mobile phase additives on linearity in particle beam lc/msen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineChemistryen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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