• Login
    View Item 
    •   UZ eScholar Home
    • Faculty of Science
    • Faculty of Science ETDs
    • Faculty of Science e-Theses Collection
    • View Item
    •   UZ eScholar Home
    • Faculty of Science
    • Faculty of Science ETDs
    • Faculty of Science e-Theses Collection
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Application of two- level full factorial designs and response surface methodology in the optimization of the variables associated with the determination of platinum using inductively coupled plasma –atomic emission spectrometry (ICP – AES)

    Thumbnail
    View/Open
    Mapfumo_APPLICATION_OF_TWO_LEVEL_FULL_FACTORIAL_DESIGNS_AND_RESPONSE_SURFACE_METHODOLOGY.pdf (499.5Kb)
    Date
    2016-04
    Author
    Mapfumo, Raison
    Metadata
    Show full item record

    Abstract
    In the present work, two -level full factorial designs and response surface methodologies were applied in the optimization of variables associated with the determination of platinum using Inductively Coupled Plasma –Atomic Emission Spectrometry (ICP-AES). The four variables, carrier gas flow rate, pump speed, plasma observation height and plasma power were regarded as factors in the optimization process. The analysis of variance (ANOVA) and a p-value significance level of 0.05 followed by the Pareto chart of standardized main and interaction effects were used to assess the significance of the factors on the response, i.e. platinum intensity. The main effects of carrier gas flow rate and plasma power and the interaction effect of carrier gas flow rate and plasma power were found to be statistically significant. The procedure was optimized using contour maps and response surface methodology. Plasma observation height and pump speed were found to have an insignificant effect on the platinum intensity. The recommended optimized procedure comprised the following levels for the variables: carrier gas flow rate of 0.70L/Min and plasma power of 1400W. Plasma observation height of 10mm above the load coil and a pump speed of 30 revolutions per minute were adopted from recommendations of other researchers. The optimized procedure was validated by analysis of Certified Reference Materials (CRMs) i.e. AMIS 0132 for low platinum grades and AMIS 0164 for high platinum grades. The precision was determined by analysis of a concentrate composite solution. The performance characteristics or analytical figures of merit for the optimized procedure were determined and the procedure was found to be fit for the intended purpose, i.e., the determination of platinum in both low grade and high grade samples like ores, tails, feeds and concentrates for metallurgical processes.
    URI
    http://hdl.handle.net/10646/2586
    Subject
    optimisation techniques
    platinum production
    platinum mining
    Collections
    • Faculty of Science e-Theses Collection [257]

    University of Zimbabwe: Educating To Change Lives!
    DSpace software copyright © 2002-2020  DuraSpace | Contact Us | Send Feedback
     

     

    Browse

    All of UZ eScholarCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    LoginRegister

    Statistics

    View Usage StatisticsView Google Analytics Statistics

    University of Zimbabwe: Educating To Change Lives!
    DSpace software copyright © 2002-2020  DuraSpace | Contact Us | Send Feedback