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Related Experiment Videos

Composite method to quantify powder flow as a screening method in early tablet or capsule formulation development.

M K Taylor1, J Ginsburg, A Hickey

  • 1Drug Delivery and Disposition, School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, USA. mkt5496@glaxowellcome.com

AAPS Pharmscitech
|January 20, 2004
PubMed
Summary
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This study evaluated powder flow measurement techniques for early tablet and capsule formulation development. Principal component analysis of angle of repose, compressibility, and critical orifice provided a reliable flowability index.

Area of Science:

  • Pharmaceutical Sciences
  • Materials Science

Background:

  • Powder flow is critical for consistent tablet and capsule manufacturing.
  • Reliable benchtop methods are needed for early-stage formulation development to predict powder flow behavior.

Purpose of the Study:

  • To identify a dependable bench test for quantifying powder flow.
  • To establish a screening method for early tablet and capsule formulation development.

Main Methods:

  • Evaluated vibrating spatula, critical orifice, angle of repose, compressibility index, and avalanching analysis.
  • Compiled and compared flow data, establishing an empirical composite index.
  • Performed principal components analysis on key flow parameters.

Main Results:

Related Experiment Videos

  • Principal component analysis of angle of repose, compressibility, and critical orifice explained 72.8% of data variability, serving as a flowability index.
  • Vibrating spatula and avalanching methods showed poor reproducibility and inconsistency with expert experience.
  • An empirical composite index correlated well with formulator experience.

Conclusions:

  • Principal component analysis offers a robust method for assessing powder flowability in early formulation.
  • Vibrating spatula and avalanching techniques require further development for reliable application.
  • A composite index based on established methods aids in predicting powder flow performance.