单宁酸用于电渗析在３０Ｖ电压下利用阴离子多孔氧化铝薄膜进行电渗析。此多孔氧化铝薄膜预先用２％的单宁酸浸渍３０ｍｉｎ。浸渍的效果是Ｃｒ２Ｏ２－以及酸性颜料阴离子的渗透力减小，而Ｎｉ２＋的渗透度增加。此种现象的原理被理解为，渗透薄膜中正电荷被浸渍的单宁酸... Tannic Acid for Electrodialysis Electrodialysis at 30 V using an anionic porous alumina membrane. The porous alumina film was pre-impregnated with 2% tannic acid for 30 min. The effect of impregnation is that the penetration of Cr2O2- and acidic pigment anions decreases, while the permeability of Ni2 + increases. The principle of this phenomenon is understood to be that tannin, which penetrates the positive charge in the film, is impregnated ...