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Related Experiment Videos

Validation of tablet dissolution method by high-performance liquid chromatography.

J H Guo1, W W Harcum, G W Skinner

  • 1Hercules Incorporated, Wilmington, DE 19808, USA. guo@brk.bf'g.com

Drug Development and Industrial Pharmacy
|March 30, 2000
PubMed
Summary

Dissolution testing is crucial for drug quality control. Filter pore size significantly impacts hydroxypropylcellulose/hydrochlorothiazide (HPC/HCTZ) formulation results, with smaller pores causing greater drug loss.

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Area of Science:

  • Pharmaceutical Sciences
  • Analytical Chemistry
  • Drug Formulation

Background:

  • Dissolution testing is a key quality control measure for pharmaceutical dosage forms, assessing drug bioavailability and batch consistency.
  • Validation of dissolution methods is essential for good manufacturing practices (GMP).
  • Hydroxypropylcellulose (HPC) is used in formulations with acetaminophen (APAP) and hydrochlorothiazide (HCTZ).

Purpose of the Study:

  • To develop and validate dissolution methods for HPC/APAP and HPC/HCTZ formulations.
  • To investigate discrepancies between high-performance liquid chromatography (HPLC) and standard dissolution testing.
  • To determine the impact of filter pore size on dissolution results.

Main Methods:

  • Utilized HP 8452A spectrophotometer and Vanderkamp 600/6010 Dissolution Tester following GMP standards.

Related Experiment Videos

  • Developed specific dissolution methods for HPC/APAP and HPC/HCTZ formulations.
  • Compared UV and HPLC analytical techniques, analyzing the effect of 10-micron and 0.2-micron filters.

    • Main Results:

    • Discrepancies between HPLC and dissolution testing were observed only for the HPC/HCTZ formulation.
    • Filtering HPC/HCTZ samples through a 10-micron filter yielded consistent results for both UV and LC analyses.
    • Smaller filter pore sizes and diameters led to increased filtration of HPC/HCTZ, indicating interaction with the filter material.

    Conclusions:

    • Filter pore size critically affects the accuracy of dissolution testing for HPC/HCTZ formulations.
    • Hydrochlorothiazide (HCTZ) exhibits a higher tendency to interact with HPC within the filter compared to other tested active ingredients.
    • The study highlights the importance of filter selection in dissolution method development and validation.