EQUILIBRIUM POTENTIALS AT THE POLYMER WATER INTERFACE

被引：22

作者：

ARMSTRONG, RD ^{[1
]}

MARCOS, ML ^{[1
]}

机构：

[1] UNIV AUTONOMA MADRID,DEPT QUIM,E-28049 MADRID,SPAIN

来源：

ELECTROCHIMICA ACTA | 1992年 / 37卷 / 06期

关键词：

PVC; POLYMER; ION-TRANSFER; IONOPHORE;

D O I：

10.1016/0013-4686(92)85218-A

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

From emf, impedance and linear sweep voltammetry measurements, equilibrium potentials at the interface between aqueous solutions and PVC-based plasticized (with di-octyl sebacate or o-nitrophenyl octyl ether) membranes have been determined for the ionic species AsPh4+, NMe4+, NEt4+, BPh4-, K+ and Ca2+. In the last two cases ionophores were present in the membrane, valinomycin for K+ and ETH129 for Ca2+. A voltammetric wave has been found for the transfer of NEt4+ from the water to the membrane phase. From the partition coefficient of AsPh4BPh4 between the two phases, the free energies of transfer have been evaluated.

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页码：1021 / 1027

页数：7

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