| 摘要 |
PCT No. PCT/NL93/00252 Sec. 371 Date May 28, 1996 Sec. 102(e) Date May 28, 1996 PCT Filed Nov. 25, 1993 PCT Pub. No. WO95/14531 PCT Pub. Date Jun. 1, 1995A method and particles for binding monovalent cations, each of the particles having a nucleus containing a cation exchange material, and applied thereon, a coating comprising a membrane being permeable for monovalent cations, in particular sodium, potassium, ammonium and hydrogen ions. The membrane is essentially not disintegrated during passage through the intestinal tract of humans or animals and wherein the membrane is more permeable for monovalent cations than for bi- or higher valent cations.
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