Abstract
Membrane charge was studied by staining method using cationic dye (methylene blue;MB) and anionic dye (orange II;OR) in 6 different dialysis membranes, taht is, plyacrylonitrile (AN69), polymethylmethacrylate (B2 and BK), polysulfone (PS), regenerated cellulose (RC) and hemophan(HE)membrane. AN69 and B2, which have negatively charged portion as sulfon group in the polymer, were stained by MB. HE, which has positively charged portion as third grade amine group in the membrane component, was stained by OR. Other PS, BK and RC membranes were not strongly stained by MB nor OR. These results suggest that evaluation of membrane charge using cationic and anionic dye is useful.
