Abstract
Solute permeability is available using Wilson-Plot Method, Klein's Method, RI Method with radioisotope-labeled solute and a new method with optical fibers. Each method gives different values for solute permeability of same membranes, and little is known real values for solute permeability. This paper describes characteristics of methods of measuring solute permeability, and effects of membrane structure on solute permeability of highly permeable (HP) dialysis membranes.
Real values for solute permeability of hollow-fiber dialysis membranes can be measured by a new method with optical fibers. Structural parameters of pore radius, surface porosity and tortuosity were determined for HP membranes from pure water permeability, solute permeability and water content data using the tortuous pore model. PAN-DX membrane has higher solute permeability than AM-EP membrane for substances of molecular weight ranging from 6, 000 to 20, 000, because PAN-DX membrane has huge pores.
