Open AccessA chalcohalide glass/alloy based Ag+ ion - selective electrode with nanomolar detection limit
Author(s) -
Lei Li,
Hongyan Yin,
Yang Wang,
Juan Zheng,
Huidan Zeng,
Guorong Chen
Publication year - 2017
Publication title -
scientific reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.24
H-Index - 213
ISSN - 2045-2322
DOI - 10.1038/s41598-017-17032-7
Subject(s) - electrode , detection limit , glass electrode , materials science , conductivity , ion , analytical chemistry (journal) , alloy , membrane , selectivity , ion selective electrode , reference electrode , chemistry , composite material , electrochemistry , chromatography , organic chemistry , biochemistry , catalysis
In this paper, a silver ion-selective electrode material with lower detection limit is presented. The electrode is based on 22.5As 2 S 3 -22.5Ag 2 S-55AgCl chalcohalide glass membranes. The low detection limit decreases from the micromolar range of the original Ag 2 S-As 2 S 3 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 2+ ), fast response and good stability.