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Epidermal Iontophoresis: I. Development of the Ionic Mobility-Pore Model

Epidermal Iontophoresis: I. Development of the Ionic Mobility-Pore Model Purpose. An integrated ionic mobility-pore model for epidermal iontophoresis is developed from theoretical considerations using both the free volume and pore restriction forms of the model for a range of solute radii (r j ) approaching the pore radii (r p ) as well as approximation of the pore restriction form for r j /r p < 0.4. In this model, we defined the determinants for iontophoresis as solute size (defined by MV, MW or radius), solute mobility, solute shape, solute charge, the Debye layer thickness, total current applied, solute concentration, fraction ionized, presence of extraneous ions (defined by solvent conductivity), epidermal permselectivity, partitioning rates to account for interaction of unionized and ionized lipophilic solutes with the wall of the pore and electroosmosis. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Pharmaceutical Research Springer Journals

Epidermal Iontophoresis: I. Development of the Ionic Mobility-Pore Model

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References (29)

Publisher
Springer Journals
Copyright
Copyright © 1998 by Plenum Publishing Corporation
Subject
Biomedicine; Pharmacology/Toxicology; Pharmacy; Biochemistry, general; Medical Law; Biomedical Engineering
ISSN
0724-8741
eISSN
1573-904X
DOI
10.1023/A:1011907201096
Publisher site
See Article on Publisher Site

Abstract

Purpose. An integrated ionic mobility-pore model for epidermal iontophoresis is developed from theoretical considerations using both the free volume and pore restriction forms of the model for a range of solute radii (r j ) approaching the pore radii (r p ) as well as approximation of the pore restriction form for r j /r p < 0.4. In this model, we defined the determinants for iontophoresis as solute size (defined by MV, MW or radius), solute mobility, solute shape, solute charge, the Debye layer thickness, total current applied, solute concentration, fraction ionized, presence of extraneous ions (defined by solvent conductivity), epidermal permselectivity, partitioning rates to account for interaction of unionized and ionized lipophilic solutes with the wall of the pore and electroosmosis.

Journal

Pharmaceutical ResearchSpringer Journals

Published: Oct 8, 2004

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