Use of fluorescence spectroscopy in concentration and supersaturation measurements in citric acid solutions

Sanjay K. Yedur, Kris A. Berglund

    Research output: Contribution to journalArticle

    • 6 Citations

    Abstract

    Measurement of supersaturation is of critical importance in the operation and control of crystallizers. In this work, we report a novel spectroscopic technique to achieve the measurement of concentration and supersaturation in crystallizing solutions. In order to develop a sensor for this measurement, citric acid is chosen as the model solute, and the analytical technique involves fluorescence spectroscopy. Citric acid is a common food-grade compound with a wide range of applications that is exclusively produced by crystallization. The fluorescent properties of a probe, 8-hydroxy-1,3,6-pyrenetrisulfonate (pyranine), are used to provide concentration measurements in aqueous citric acid solutions, thereby providing for supersaturation estimation. The change in the relative emission peak intensities of the probe in different solute concentrations gives an excellent calibration curve for concentration measurements. It is also shown that, although pyranine responds to both its solvent microenvironment and the pH of the solution, it is still possible to measure concentration and supersaturation by using this fluorescence technique.

    Original languageEnglish (US)
    Pages (from-to)866-870
    Number of pages5
    JournalApplied Spectroscopy
    Volume50
    Issue number7
    StatePublished - Jul 1996

    Profile

    Buccal Administration
    supersaturation
    Erythrosine
    Supersaturation
    citric acid
    Citric acid
    fluorescence
    solutes
    probes
    spectroscopy
    Hyperkinesis
    Fluorescence spectroscopy
    food
    grade
    crystallization
    sensors
    curves
    Viral Cytopathogenic Effect
    Anthralin
    Acromioclavicular Joint

    Keywords

    • Citric acid
    • Fluorescence
    • Pyranine
    • Supersaturation sensor

    ASJC Scopus subject areas

    • Spectroscopy
    • Instrumentation

    Cite this

    Use of fluorescence spectroscopy in concentration and supersaturation measurements in citric acid solutions. / Yedur, Sanjay K.; Berglund, Kris A.

    In: Applied Spectroscopy, Vol. 50, No. 7, 07.1996, p. 866-870.

    Research output: Contribution to journalArticle

    Yedur, Sanjay K.; Berglund, Kris A. / Use of fluorescence spectroscopy in concentration and supersaturation measurements in citric acid solutions.

    In: Applied Spectroscopy, Vol. 50, No. 7, 07.1996, p. 866-870.

    Research output: Contribution to journalArticle

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