Ready-to-use polymeric films used as the electrified liquid-liquid interface supports.

In this work, we have tested two commercially available polymeric films: one with natural porosity (polyvinylidene difluoride - PVDF) and the other modified to include micropores (ethylene-vinyl acetate - EVA) created through needle puncturing. Subsequently, these films were successfully employed for the miniaturization of the electrified liquid-liquid interface formed between water and 1,2-dichloroethane solutions. The geometry of the membranes was assessed with confocal microscopy, the aqueous phase wettability was evaluated with a drop-shape analyzer whereas their ability to support the electrified liquid-liquid interfaces was followed with ion transfer voltammetry.

Phenylethylamine sensing at the electrified liquid-liquid interface. Can electrochemistry be used to follow the UHT milk spoilage process?

This study involved an investigation into the electrochemical characteristic of a few biogenic amines (BAs) occurring at the polarized interface between two immiscible electrolyte solutions (ITIES) with ion transfer voltammetry (ITV). The main focus of this research was the comprehensive electroanalytical and physicochemical analysis of phenylethylamine (PEA), allowing the determined of the formal Galvani potential of the ion transfer reaction (ΔΦ), diffusion coefficients (D), formal free Gibbs energy of the ion transfer reaction (ΔG) and water-1,2-dichloroethane partition coefficient (logP). Furthermore, the collected data were employed to calculate analytical parameters, including voltametric detection sensitivity, limits of detection and the target analyte quantification.

Voltammetric study of cefotaxime at the macroscopic and miniaturized interface between two immiscible electrolyte solutions.

The electrochemical behavior of cefotaxime (CTX) was investigated at the polarized macro- and micro-interface between two immiscible electrolyte solutions (ITIES) by cyclic voltammetry and alternating current voltammetry. Miniaturization was achieved with fused silica microcapillary tubing entrapped in a polymeric casing. Scanning electron microscopy (SEM) was employed for the fabricated LLI support characterization.