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Validation of a flow-through diffusion cell for use in transdermal research
W J Addicks1, G L Flynn, N Weiner
1College of Pharmacy, University of Michigan, Ann Arbor 48109.
Pharmaceutical Research
|August 1, 1987
Summary
A novel flow-through diffusion cell offers a more efficient method for transdermal drug delivery research. This design improves mixing and saves time compared to traditional Franz cells.
Area of Science:
- Pharmacology
- Materials Science
- Chemical Engineering
Background:
- Transdermal drug delivery requires precise measurement of permeation.
- Conventional Franz cells can be time-consuming and labor-intensive.
- Improved diffusion cell designs are needed for enhanced research efficiency.
Purpose of the Study:
- To design and validate a novel flow-through finite-dose diffusion cell.
- To compare its performance against a conventional Franz cell.
- To assess its utility in transdermal drug delivery research.
Main Methods:
- A flow-through diffusion cell with an automatic fraction collector was designed.
- Homologous alkyl p-aminobenzoates were diffused through dimethylpolysiloxane membranes.
- Permeability coefficients were measured and compared between the flow-through and Franz cells.
Main Results:
- Permeability coefficients increased with alkyl chain length, plateauing at the butyrate ester.
- This indicated a shift from membrane-controlled to boundary layer-controlled diffusion.
- Faster permeation of butyrate and valerate compounds was observed with the flow-through cell, suggesting superior mixing.
Conclusions:
- The flow-through diffusion cell demonstrates efficient performance.
- It offers advantages in time and labor savings over conventional Franz cells.
- This cell is a viable alternative for transdermal drug delivery research.