Plasticized PVC as a high efficiency selective barrier for the amperometric detection of phenolics

Abstract

Ion selective and amperometric electrodes based on PVC membranes were constructed for the measurement of phenolics and assessed for potential use in monitoring coke works effluent treatment. Potentiometric working ranges are restricted to >lo0 mM, suffering thiocyanate interference, despite response slopes of <160mV/decade. Fabrication of a planar format is described, suitable for mass production. Similar membranes have been characterized in amperometric sensors, achieving greater sensitivity (>O. 1 mM), tailored linear ranges and elimination of thiocyanate interference. Enhancement of electrochemical responses by use of high (>13) pH is achieved by stable encapsulation of such an environment beneath ion impermeable PVC within the sensor structure.

Use of plastic-based analytical device, smartphone and chemometric tools to discriminate amines

“…Furthermore, different matrices have been proposed such as various types of papers, 20,21 polymers in general, 12,22,23 in order for satisfactory results to be obtained. Synthetic polymeric membranes have been used in a variety of sensor applications, for example, ion selective electrodes 24 and amperometric sensors 25,26 to enhance the selective permeability of ions and small molecules. 27,28 They are easy to prepare from polymer powders using solvent-casting techniques and permselectivity is typically conferred by the inclusion of a plasticiser/modifying agent 29 and can therefore be designed to be compatible with packaging materials for facile sensor integrations, while simultaneously observing food industry regulations for synthetic materials being in contact with food.…”

Partial filling technique in capillary electrophoresis for the separation of phenolic isomers with sulfonatocalix[4]arene as a selector

“…Studies on the separation and determination of these pollutants are actively continuing. Conventional methods used to monitor phenolic pollutants are gas chromatography [27,28], highperformance liquid chromatography [29,30], spectroscopy [31], and electrochemistry [32]. Due to the excellent analytical performance of CE, it has become one of the most promising methods to separate phenolic derivatives.…”