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Related Experiment Videos

Serum gentamicin assay by high-performance liquid chromatography.

S K Maitra, T T Yoshikawa, J L Hansen

    Clinical Chemistry
    |December 1, 1977
    PubMed
    Summary

    A new high-performance liquid chromatography method accurately quantifies gentamicin in serum. This rapid assay is sensitive, specific, and applicable to other aminoglycoside antibiotics.

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    Area of Science:

    • Analytical Chemistry
    • Pharmacology

    Background:

    • Accurate quantification of gentamicin in serum is crucial for therapeutic drug monitoring.
    • Existing microbiological assays can be time-consuming and may lack specificity.

    Purpose of the Study:

    • To develop and validate a rapid, sensitive, and specific high-performance liquid chromatographic (HPLC) method for gentamicin determination in serum.

    Main Methods:

    • Serum samples were processed using a silicic acid column for gentamicin separation.
    • Gentamicin was derivatized with o-phthalaldehyde and eluted with ethanol.
    • Reversed-phase chromatography separated derivatized gentamicin components.
    • Quantification was performed using fluorometry.

    Main Results:

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    • The method accurately determined gentamicin concentrations as low as 0.5 mg/L.
    • A linear response was observed for concentrations ranging from 0 to 20 mg/L.
    • No interference was observed from common antibiotics, and the assay correlated highly (r=0.99) with microbiological methods.

    Conclusions:

    • This HPLC method provides a rapid (under 30 minutes), accurate, and specific means for quantifying gentamicin in serum.
    • The assay's sensitivity and specificity make it suitable for clinical applications.
    • The method shows potential applicability to other aminoglycoside antibiotics.