Summary
Basic considerations for analyte enrichment and recovery obtainable by electrodialysis as a sample treatment method are given. Equations are derived which describe the dependence of the concentration profiles of ionic compounds on the electric field strength in a set-up with stagnant donor and acceptor solutions. It is shown that analyte recovery increases when less ion-selective membranes are used in the electrodialysis cell. Computer models are used to estimate the analyte enrichment for a flowing donor (sample) and a stagnant acceptor phase. About 10-fold enrichment can be obtained in an electrodialytic sample treatment system within 20 min under maximum current conditions. A compromise has to be found between analyte recovery and the donor (sample) flow rate.
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Debets, A.J.J., v. Wier, P., Hupe, K.P. et al. Theoretical models for electrodialytic sample treatment in trace analysis by liquid chromatography. Chromatographia 39, 460–468 (1994). https://doi.org/10.1007/BF02278763
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DOI: https://doi.org/10.1007/BF02278763