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Related Experiment Videos

Solution rate of crystals at fluid-fluid interface.

A J Schoonen, G W de Vries-Nijboer, T Huizinga

    Journal of Pharmaceutical Sciences
    |February 1, 1979
    PubMed
    Summary
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    The dissolution lifetime of potassium ferricyanide crystals at an interface is proportional to their initial size and dissolution rate. Crystal shape changes during dissolution due to non-isometric face dissolution and varying film thickness.

    Area of Science:

    • Physical Chemistry
    • Materials Science
    • Chemical Engineering

    Background:

    • Understanding crystal dissolution is crucial for chemical processes.
    • Interfacial phenomena significantly influence dissolution rates.
    • Potassium ferricyanide serves as a model compound for studying dissolution dynamics.

    Purpose of the Study:

    • To develop a model system for studying single crystal dissolution at a liquid-interface.
    • To investigate the factors controlling the dissolution lifetime of potassium ferricyanide crystals.
    • To analyze the relationship between crystal size, shape, and dissolution behavior.

    Main Methods:

    • Microscopic measurement of crystal dimensions prior to dissolution.
    • Spectrophotometric measurement of mass flow using a continuous-flow apparatus.

    Related Experiment Videos

  • Visual observation of dissolving crystals via projection on a screen.

    • Main Results:

    • Crystal lifetime is proportional to the shortest crystal face length at the interface.
    • Dissolution lifetime is largely independent of the crystal's overall form.
    • Observed changes in crystal shape are attributed to non-isometric dissolution and variable film thickness.

    Conclusions:

    • The initial size and dissolution rate are key determinants of crystal lifetime at the interface.
    • Crystal shape evolution is a complex interplay of dissolution anisotropy and interfacial conditions.
    • The developed model system provides insights into interfacial dissolution processes.