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Related Experiment Videos

GLC assay for fenclorac

A J Visalli, D M Patel, N H Reavey-Cantwell

    Journal of Pharmaceutical Sciences
    |November 1, 1976
    PubMed
    Summary

    A new gas-liquid chromatography (GLC) method accurately quantifies fenclorac diethylamine salt and its synthesis impurities. This stability-indicating assay is crucial for pharmaceutical quality control.

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    Area of Science:

    • Analytical Chemistry
    • Pharmaceutical Analysis
    • Chromatography

    Background:

    • Accurate quantification of active pharmaceutical ingredients (APIs) and their impurities is essential for drug safety and efficacy.
    • Stability-indicating methods are required to assess drug degradation over time and under various conditions.
    • Fenclorac, a non-steroidal anti-inflammatory drug, requires robust analytical methods for quality control.

    Purpose of the Study:

    • To develop and validate a rapid, stability-indicating gas-liquid chromatography (GLC) method for fenclorac diethylamine salt.
    • To simultaneously detect and quantify specific impurities arising from fenclorac synthesis.
    • To characterize impurity structures using advanced analytical techniques.

    Main Methods:

    • Gas-liquid chromatography (GLC) with a hydrogen flame-ionization detector (FID).
    • Derivatization of analytes to form silyl derivatives for enhanced volatility and detection.
    • Use of triphenylethylene as an internal standard for accurate quantification.
    • Separation achieved on a phenyl methyl silicone column at approximately 195°C.
    • Gas chromatography-mass spectrometry (GC-MS) for characterization of silyl derivatives.

    Main Results:

    • A rapid and effective GLC method was established for fenclorac diethylamine salt determination.
    • The method successfully quantifies key synthesis impurities: 3-chloro-4-cyclohexylphenylglycolic acid and alpha-chloro-4-cyclohexylphenylacetic acid.
    • One impurity was identified as a degradation product of fenclorac, highlighting its significance.
    • GLC-MS confirmed the identity of the silyl derivatives, validating the analytical approach.

    Conclusions:

    • The developed GLC method is stability-indicating and suitable for routine analysis of fenclorac dosage forms.
    • This method provides a reliable tool for monitoring drug substance purity and identifying degradation products.
    • The findings contribute to ensuring the quality and safety of fenclorac pharmaceutical products.

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