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Fluorescence and Phosphorescence: Instrumentation01:25

Fluorescence and Phosphorescence: Instrumentation

Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.

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G A Capelle, L A Franks

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    Summary
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    This study compares two fluorosensor systems using nitrogen (N(2)) and krypton fluoride (KrF) lasers for detecting organic coal processing effluents. Both systems show promise for remote environmental monitoring under various conditions.

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    Area of Science:

    • Environmental Science
    • Analytical Chemistry
    • Laser Technology

    Background:

    • Coal processing generates organic effluents that pose environmental risks.
    • Remote sensing technologies are needed for effective monitoring of these effluents.
    • Fluorosensor systems offer a potential solution for detecting organic compounds.

    Purpose of the Study:

    • To compare the performance of two laboratory fluorosensor systems.
    • To assess the feasibility of remote detection of organic coal processing effluents.
    • To evaluate system capabilities under different environmental conditions.

    Main Methods:

    • Two fluorosensor systems utilizing nitrogen (N(2)) and krypton fluoride (KrF) lasers were developed and tested.
    • System performance was evaluated using actual effluents and reference solutions.
    • Measurements were conducted during both day and night conditions.
    • Experiments included a multichannel system configuration.

    Main Results:

    • Both N(2) and KrF laser-based fluorosensor systems demonstrated capabilities for detecting organic effluents.
    • System performance was assessed under various lighting conditions, indicating potential for continuous monitoring.
    • Data suggests feasibility for remote detection and prediction for an airborne system.

    Conclusions:

    • Fluorosensor systems based on N(2) and KrF lasers are viable for remote detection of coal processing effluents.
    • The developed systems show potential for environmental monitoring applications.
    • Further development for airborne deployment is recommended.