Piezodialysis: a comparison of theoretical treatments

In recent years our two laboratories have developed and used differing theoretical analyses of piezodialysis. That of Leitz is expressed in terms of water and salt flows (WS); that of Weinstein, in terms of volume, salt and electric current (VSI). The VSI is a more general treatment than WS, but the two are here shown to yield identical predictions in the very important limiting case of negligible coion fluxes. The difference between coupling factors β and β represents the uncoupling effect of external solution path resistances.