Pharmaceutical Research

, Volume 4, Issue 4, pp 337–341 | Cite as

Validation of a Flow-Through Diffusion Cell for Use in Transdermal Research

  • William J. Addicks
  • Gordon L. Flynn
  • Norman Weiner


A flow-through finite-dose diffusion cell has been designed for use in transdermal drug delivery research. The diffusion cell consists of an upper donor chamber and a lower receiver compartment through which a continuous supply of fresh solvent flows. The flow is directed to an automatic fraction collector. To validate the flow-through cell, its performance was compared directly against that of a conventional single-reservoir Franz cell. Homologous alkyl p-aminobenzoates were diffused through dimethylpolysiloxane membranes, and permeability coefficients increased with increasing chain length, reaching a plateau at the butyrate ester for both types of cells. This behavior suggests a shift from membrane-controlled diffusion to boundary layer control. Permeation of the butyrate and valerate compounds was significantly faster when the flow-through cell was used, suggesting that better mixing is obtained through the flow-through cell design. Considering the advantages offered in terms of time and labor saved through its use, the flow-through cell with automatic fraction collector appears to be a viable alternative to the conventional Franz cell.

transdermal diffusion cells flow-through Franz cell 


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Copyright information

© Plenum Publishing Corporation 1987

Authors and Affiliations

  • William J. Addicks
    • 1
  • Gordon L. Flynn
  • Norman Weiner
  1. 1.College of PharmacyUniversity of MichiganAnn Arbor

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