PVC-matrix membrane ion-selective sensors for gold determination in cyanide solutions

被引：4

作者：

Kolytcheva, NV

Petrukhin, OM

Filipjeva, NV

Spivakov, BY

Myasoedov, BF

机构：

[1] DI Mendeleev Chem Technol Inst, Dept Analyt Chem, Moscow 125190, Russia

[2] VI Vernadskii Inst Geochem & Analyt Chem, Moscow 117975, Russia

来源：

ANALYTICA CHIMICA ACTA | 1997年 / 357卷 / 03期

关键词：

PVC-matrix membranes; ion-selective sensors; sensors; gold determination; ion-selective field-effect transistors (ISFET);

D O I：

10.1016/S0003-2670(97)00575-8

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Potentiometric sensors with conventional plasticized poly(vinyl-chloride) membranes, sensitive to the dicyanoaurate ion, and two kinds of transducers (an encapsulated pH-sensitive ion-selective field-effect transistor (ISFET) with Ta2O5 as a gate insulator and a silver coated ceramic substrate (AgCer)), were studied. The application of an intermediate hydrophobic polymer layer between the ion sensitive membrane and the transducer surface leads to a dramatical rise of the ISFET life time and, on the contrary, to a decrease of AgCer based sensor durability from 6 months down to 5-6 weeks. The effects of membrane plasticizer and thickness on the performance, selectivity and durability of these sensors were studied. (C) 1997 Elsevier Science B.V.

引用

页码：231 / 238

页数：8