Hirsch-Ayalon P
J Membr Biol. 1979 Dec 12;51(1):1-6. doi: 10.1007/BF01869339.
The conditioned state of a precipitation membrane with its particular properties exists within a limited range of membrane potentials and requires certain minimum concentrations, Clim, of the generating ions in the adjoining solutions. We investigated these quantities for the BaSO4 cellophane membrane and found Clim to be 10 X 10(-5) N (0.5 X 10(-4) M), equally for Ba++ and SO4--. Beyond these limits, the membrane becomes deconditioned. This transformation is a reversible process provided the limits have not been surpassed too far. The capability for de- and reconditioning is a characteristic and unique property of precipitation membranes, not found in other membrane systems. The phenomenon is explained by the adsorption theory for precipitation membranes. It allows wide modifications and quick variations of the electrical properties and permeability of the membrane in an easy and reversible manner.
具有特定性质的沉淀膜的条件状态存在于有限的膜电位范围内，并且在相邻溶液中需要一定的最低浓度Clim的生成离子。我们研究了硫酸钡玻璃纸膜的这些量，发现Clim对于钡离子和硫酸根离子均为10×10⁻⁵ N（0.5×10⁻⁴ M）。超过这些限度，膜就会失去条件。只要限度没有被过度超越，这种转变就是一个可逆过程。去条件化和再条件化的能力是沉淀膜的一种独特特性，在其他膜系统中未发现。这种现象可以用沉淀膜的吸附理论来解释。它允许以简单且可逆的方式对膜的电学性质和渗透性进行广泛的修改和快速变化。
