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研究了Nafion117膜(一种全氟磺酸膜)对阳离子的选择性,测定了含K~+、Ni~(2+)及Fe~(3+)的Nafion 117膜的离子选择性系数,实验发现含H~+、K~+、Pb~(2+)、Ni~(2+)、Co~(2+)、Fe~(3+)等离子的膜都能较好符合Nemst响应.膜对一价离子的选择性优于二价及三价离子.
The selectivity of Nafion117 membrane (a perfluorinated sulfonic acid membrane) to cations was investigated. The ion selectivity of Nafion 117 membrane with K ~ +, Ni ~ (2+) and Fe ~ (3+) The results show that the films containing H ~ +, K ~ +, Pb ~ (2 +), Ni ~ (2 +), Co ~ (2 +) and Fe ~ (3+) The selectivity for monovalent ions is superior to the bivalent and trivalent ions.