Methodology of measurement of ionic strength based on field-flow fractionation

In this report, we put forward an experimental method to determine the ionic strength of an aqueous solution. To this end, we have developed a theory of ionic strength I expressed in terms of the retention ratios in field-flow fractionation (FFF) as I1/2=κ(1-R)/(1-Ro)-ε-1/2. Here R is a measured retention ratio using an FFF technique, for instance, sedimentation FFF (SdFFF), and Ro is the sterically-corrected standard retention ratio as given by...