A new type of lead (II) ion-selective ceramic membrane electrode

Abstract

A new type of lead ion-selective membrane electrode has been developed by a sintering method, and a hot-pressing method. These ceramic membranes consist of PbS-Ag 2S-Cu 2S systems. Nernstian response to lead ion activity was obtained over a concentration range of 10 −1–10 −6 M and the analytical range was 10 −1–10 −7 M, ▪ when the membrane contained less than 30% of copper(I) sulfide and more than 1% of lead sulfide. The response time of the membrane containing 5–20% of copper(I) sulfide was 2 3 – 1 2 of that of PbSAg 2S membrane.