Ionophore-based ion-selective potentiometric and optical sensors

Abstract

This paper describes ion-selective electrodes (ISEs) and optodes with a focus on the fundamental mechanisms, response characteristics, and recognition elements (ionophores) described to date for these sensors. The topics covered review the most frequently encountered ideas about ionophore-based sensors, including the theoretical and experimental parameters that influence response, typical ionophore structures, useful membrane compositions, and applications. Since these sensors are applicable in a number of fields, such as clinical, environmental, and process monitoring, as well as more novel approaches such as microfluidic-based systems and micro/nanoprobes, this article provides descriptions that are oriented toward a more general audience. Furthermore, a large portion of this review describes the ionophore component itself in hopes of inspiring ideas in readers of how novel molecular architectures with new ionic targets or improved selectivity can be developed.

An effective solid contact for an all-solid-state polymeric membrane Cd 2+ -selective electrode: Three-dimensional porous graphene-mesoporous platinum nanoparticle composite

“…11). The proposed Cd 2+ -ISE is robust to the interferences from O 2 and CO 2 and there are no obvious potential drifts during the measurements. The results are consistent with those of other carbon nanomaterialbased ASS-ISEs [12,16,25,51].…”

“…Ion-selective electrodes (ISEs) have been widely used to determine the activities of ions for environmental monitoring, medical diagnosis and industrial analysis [1][2][3]. However, due to the presence of the inner filling solution, the traditional liquid-contact ion-selective electrodes suffer from disadvantages of inconvenience for miniaturization, difficulty in production and fragility to external pressure [4].…”

A Solid-Contact Indium(III) Sensor based on a Thiosulfinate Ionophore Derived from Omeprazole

“…2 Ionophore based ion-selective sensors have gained attention during the last decade because of their high selectivity, 3 and sulfur-containing ionophores are extremely interesting. 4 Thiosulfinates are the salts of thiosulfinic acids that contain a -S-S(O) functional group.…”

Development of a Micro-Potentiometric Sensor for the Microchip Analysis of Alkali Ions

“…At present, there are two types of analysis in wide use to detect alkali ions in water: ion chromatography with conductivity detection 1 and ionophore-based ion-selective potentiometric and optical sensors. 2 High-performance ion chromatography demonstrates excellent alkali ion analysis results at trace levels in pure water; 3,4 however, the necessary sample volume and lengthy separation time are still problematic. Recent progress in the development of potentiometric sensors may be a solution for trace-level analytical problems.…”