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Fluorogenic reaction and specific microdetermination of ammonia

K Sugawara, F Oyama

    Journal of Biochemistry
    |March 1, 1981
    PubMed
    Summary

    A new fluorogenic reaction detects ammonia using omicron-phthalaldehyde (OPT) and dithiothreitol (DTT). This specific method allows for sensitive, nanomole-level quantification of ammonia in biological samples.

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    Area of Science:

    • Analytical Chemistry
    • Biochemistry

    Background:

    • Ammonia is a crucial analyte in biological systems.
    • Accurate quantification of ammonia is essential for various research fields.

    Purpose of the Study:

    • To report a novel fluorogenic reaction for ammonia detection.
    • To establish optimal conditions for ammonia quantification.

    Main Methods:

    • Utilized the reaction between ammonia, omicron-phthalaldehyde (OPT), and dithiothreitol (DTT).
    • Determined optimal excitation (λex = 413 nm) and emission (λem = 476 nm) wavelengths.
    • Assessed specificity against other amino compounds.

    Main Results:

    • The reaction produces fluorescence specific to ammonia.
    • Other amino compounds like amino acids, amines, and proteins do not interfere.
    • Achieved sensitive detection down to the nanomole range.

    Conclusions:

    • The OPT-DTT reaction provides a specific and sensitive method for ammonia microdetermination.
    • This technique is suitable for analyzing ammonia in biological materials.

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