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    Optimizing the Sensitivity of Particulate Silica Quantification by Molybdenum Blue Absorbance Spectrometry

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    BoulterSpr18.pdf (368.9Kb)
    BoulterSpr18.pptx (224.7Kb)
    Date
    2018-04
    Author
    Boulter, James E.
    Wagner, Emily
    Metadata
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    Abstract
    The optimum initial pH (before addition of molybdate) for the dissolution of silica to form HPA is approx. pH 10. This may be due to the balance between enhanced silica solubility at high pH and the optimal (low) pH of the reaction to form HPA. As the acidic molybdate solution is added to the basic silica suspension to initiate the reaction, the initial solution pH quickly falls to approx. pH 1-2 for the formation of heteropoly blue. The objective of this research is to optimize analytical sensitivity for various types of silica.
    Subject
    Posters
    Silica
    Chemistry
    Spectrometry
    Permanent Link
    http://digital.library.wisc.edu/1793/79847
    Type
    Presentation
    Description
    Color poster with text, images, and graphs.
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