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    Inductively coupled plasma atomic emission spectroscopy applied to the analysis of wear metals in lubricating oil and related studies.

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    Author
    Freelin, Julie Michelle.
    Issue Date
    1990
    Keywords
    Mechanical wear
    Metals -- Testing
    Atomic emission spectroscopy
    Advisor
    Denton, M.B.
    
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    Show full item record
    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
    The accurate determination of wear metals in lubricating fluids is of great potential value in the proper maintainence of all types of machinery. Savings of both time and money have been reported in the military and civilian sectors following the implementation of routine wear metal screening in lubricating oils. Current methods are known to discriminate against metals present in the form of particulates. The first part of this dissertation focusses on the direct determination of wear metals in lubricating oils by atomic emission spectroscopy utilizing an inverted inductively coupled plasma as a source. Data are presented which show the effects of power and viewing position on the signal intensity of a variety of sized iron particulate samples in lubricating oil. The second part of this dissertation describes the characterization of a relatively new spectroscopic source--the dual inductively coupled plasma (DICP). The DICP increases the residence time of the analyte in the source by extending the physical length of the plasma discharge and providing two energy deposition regions. Emission intensity, electron density, ion-to-atom intensity ratios, and calculated temperatures are used to compare the DICP with standard inductively coupled plasmas recorded in the literature.
    Type
    text
    Dissertation-Reproduction (electronic)
    Degree Name
    Ph.D.
    Degree Level
    doctoral
    Degree Program
    Chemistry
    Graduate College
    Degree Grantor
    University of Arizona
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