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Related Experiment Videos

Automated analytical systems for drug development studies. II--A system for dissolution testing

K P Shah1, M Chang, C M Riley

  • 1Department of Pharmaceutical Chemistry, University of Kansas, Lawrence 66045, USA.

Journal of Pharmaceutical and Biomedical Analysis
|December 1, 1994
PubMed
Summary

Automated microdialysis sampling reproducibly measures tablet dissolution. This method, validated for acetaminophen and Sulfatrim, offers an efficient alternative to manual sampling in pharmaceutical analysis.

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Area of Science:

  • Pharmaceutical Sciences
  • Analytical Chemistry
  • Drug Delivery

Background:

  • Traditional tablet dissolution testing often involves manual sampling, which can be labor-intensive and prone to variability.
  • Microdialysis offers a dynamic sampling technique for in-situ analysis of analytes in complex matrices.
  • Automating dissolution testing can improve efficiency, reproducibility, and data quality in pharmaceutical quality control.

Purpose of the Study:

  • To develop and validate an automated system for tablet dissolution testing using microdialysis sampling.
  • To compare the dissolution profiles obtained by automated microdialysis with those from manual sampling.
  • To assess the reproducibility and drug recovery characteristics of the microdialysis probe in dissolution media.

Main Methods:

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  • An automated system was created by interfacing a microinfusion pump and an on-line liquid chromatography (LC) system with a dissolution apparatus.
  • A microdialysis loop probe was immersed in the dissolution medium for continuous sampling.
  • The system was used to measure the dissolution of acetaminophen and Sulfatrim tablets, with drug recovery and reproducibility assessed.

Main Results:

  • The automated microdialysis system demonstrated high reproducibility (RSD < 2%) for measuring tablet dissolution.
  • Drug recovery from the microdialysis probe was dependent on the perfusion rate but independent of drug concentration within the linear assay range.
  • Dissolution profiles generated by microdialysis sampling were comparable to those obtained by manual sampling for both acetaminophen and Sulfatrim tablets.

Conclusions:

  • Automated microdialysis provides a reproducible and reliable method for characterizing drug release from tablets.
  • The technique allows for in-line sample conditioning, such as buffering, prior to LC analysis.
  • Microdialysis sampling is a viable alternative to manual methods for dissolution testing, offering potential advantages in automation and sample handling.