Fig. 1

Extraction efficiency of putrescine (Ptr), cadaverine Cdr), spermine (Spm) and spermidine (Spd) form urine by flat sheet supported liquid membrane in dependence of pH of the acceptor phase: (a) 0.1 M HCl as acceptor phase, (b) 1 M HCl as acceptor phase. Concentration of polyamines in donor phase is 50 μM