A chalcohalide glass/alloy based Ag+ ion - selective electrode with nanomolar detection limit

Abstract

In this paper, a silver ion-selective electrode material with lower detection limit is presented. The electrode is based on 22.5As2S3-22.5Ag2S-55AgCl chalcohalide glass membranes. The low detection limit decreases from the micromolar range of the original Ag2S-As2S3 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 Hg2+), fast response and good stability.

Hybrid Nanocomposite Based Graphene Sensor for Ultrasensitive Clomipramine HCl Detection

“…As declared in Figure 8, the response time of developed graphene sensor decreased gradually from 5, 4 to 3 s as the CLP.HCl concentration increased from 1.0×10 −5 to 1.0×10 −2 mol L −1 . This behavior may be stemmed from the diffusion driving force of the diffusion layer which increases gradually with the analyte concentration increases leading to faster ion transport and so, the sensor displayed shorter response time [52, 53]. Furthermore, the fabricated CLP.HCl selective sensor showed very fast response time of 4 s overall the working concentration range (1.0×10 −5 −1.0×10 −2 mol L −1 ) affirming the superior sensitivity of the developed electrode.…”

Extended glass‐forming region in the AgCl‐Ag2S‐As2S3 ternary system

“…Our previous study has found that the Ag + ‐ISEs based on the AgCl‐Ag 2 S‐As 2 S 3 ChH glass system possess a low Ag + detection limit . A following study also shows that these Ag + ‐ISEs also well respond to Cl − ions, thus being potentially useful for determining the chloride ion concentration in aqueous solutions.…”

Scalable approach towards specific and ultrasensitive cation sensing under harsh environmental conditions by engineering the analyte–transducer interface

“…Importantly, the operation of one device does not hinder the other devices establishing their operability in both standalone manner and in a multiplexing array. Such an array provides a distinct advantage over other ISE assemblies [44][45][46] that can operate only in stand-alone fashion. Further versatility of the sensor is demonstrated by operating the CNT-thread as a common RE while utilising two different WE for Hg 2+ and Cd 2+ within the same sensor (Figure 4(k)).…”