Single-Piece All-Solid-State Potential Ion-Selective Electrodes Integrated with Molecularly Imprinted Polymers (MIPs) for Neutral 2,4-Dichlorophenol Assessment

Abstract

A novel single-piece all-solid-state ion-selective electrode (SC/ISE) based on carbon-screen printed is introduced. Polyaniline (PANI) is dissolved in a membrane cocktail that contains the same components used for making a conventional ion-selective polyvinyl chloride (PVC) matrix membrane. The membrane, having the PANI, is directly drop-casted on a carbon substrate (screen-printed-carbon electrode). PANI was added to act as an intermediary between the substrate and the membrane for the charge transfer process. Under non-equilibrium sensing mechanism, the sensors revealed high sensitivity towards 2,4-dichlorophenol (DCP) over the linearity range 0.47 to 13 µM and a detection limit 0.13 µm. The selectivity was measured by the modified separate solution method (MSSM) and showed good selectivity towards 2,4-DCP over the most commonly studied ions. All measurements were done in 30 mm Tris buffer solution at a pH 5.0. Using constant-current chronopotentiometry, the potential drift for the proposed electrodes was checked. Improvement in the potential stability of the SPE was observed after the addition of PANI in the sensing membrane as compared to the corresponding coated-wire electrode (membrane without PANI). The applicability of the sensor has been checked by measuring 2,4-DCP in different water samples and the results were compared with the standard HPLC method.

Integrated all-solid-state sulfite sensors modified with two different ion-to-electron transducers: rapid assessment of sulfite in beverages

“…Nowadays, all-solid-state potentiometric electrodes have attracted great interest in ion sensing for diverse applications such as clinical and environmental elds due to their outstanding properties such as high portability, simplicity of use, affordability and exibility. [34][35][36][37][38] They are now recognized as the next generation for ion-sensing potentiometric electrodes. When the ion-sensing membrane is directly casted on the electronic conductor (i.e.…”

Modified Potentiometric Screen-Printed Electrodes Based on Imprinting Character for Sodium Deoxycholate Determination

“…These ionophores are characterized by their high cost, or using ion exchangers, and characterized by their poor selectivity. On the other hand, MIPs are thermally stable, costly effective, and easier to synthesize [16,17]. Currently, potentiometric sensors based on different MIP receptors have been synthesized for determination of different organic species in either their ionic or neutral forms [16,[18][19][20].…”

“…On the other hand, MIPs are thermally stable, costly effective, and easier to synthesize [16,17]. Currently, potentiometric sensors based on different MIP receptors have been synthesized for determination of different organic species in either their ionic or neutral forms [16,[18][19][20]. Few reports are presented in the literature for imprinted synthetic receptors for deoxycholate [21,22].…”

Imprinted Polymeric Beads-Based Screen-Printed Potentiometric Platforms Modified with Multi-Walled Carbon Nanotubes (MWCNTs) for Selective Recognition of Fluoxetine

“…This reveals serious limits to their wide use, especially in less developed countries. For cost-effectiveness, fast, accessible and precise analysis, simple instrumentation, and incorporated functionality, screen-printed ISEs have been chosen for flexible, reliable and low-cost platforms for potentiometric analytical devices [24][25][26]. In addition, this type of electrode offers a practical viable method without sample pretreatment, prolonged analysis time and sophisticated experimental establishment.…”