一种基于卤化银玻璃/合金的具有纳摩尔检测限的银离子选择性电极。

Li Lei, Yin Haiwei, Wang Yang, Zheng Jianhua, Zeng Huidan, Chen Guorong

School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China.

Sci Rep. 2017 Dec 1;7(1):16752. doi: 10.1038/s41598-017-17032-7.

In this paper, a silver ion-selective electrode material with lower detection limit is presented. The electrode is based on 22.5AsS-22.5AgS-55AgCl chalcohalide glass membranes. The low detection limit decreases from the micromolar range of the original AgS-AsS electrode to the nanomolar level (1.89 nM) by introducing AgCl. The addition of AgCl increases the conductivity of the glasses and improves the analytical properties of electrodes because of the joint effects of Ag and Cl on network structure of the glass. The super-Nernstian response behavior was observed for the partially crystallized electrode. The electrode containing AgCl also possesses a high selectivity (except for Hg), fast response and good stability.

本文介绍了一种具有较低检测限的银离子选择性电极材料。该电极基于22.5AsS-22.5AgS-55AgCl硫卤化物玻璃膜。通过引入AgCl，低检测限从原始AgS-AsS电极的微摩尔范围降低到纳摩尔水平（1.89 nM）。由于Ag和Cl对玻璃网络结构的共同作用，AgCl的添加提高了玻璃的电导率并改善了电极的分析性能。观察到部分结晶电极具有超能斯特响应行为。含AgCl的电极还具有高选择性（除Hg外）、快速响应和良好的稳定性。