Coupled Transport of Amino Acids through Poly(vinyl chloride)Trialkyl Phosphate Membranes

Abstract

Some amino acids were transmitted through poly(vinyl chloride) (PVC) membranes containing trialkyl phosphates (e. g. tributyl phosphate (TBP) and tripentyl phosphate (TPP)) against their concentration gradient when the hexafluorophosphate or perchlorate ions were allowed to flow at the same time. The transport of amino acids occurred only under the acidic conditions of the donor aqueous phase. The transport rate was also affected by the pH difference across the membranes.