Rapid preparation of robust polyaniline coating on an etched stainless steel wire for solid-phase microextraction of dissolved bisphenol A in drinking water and beverages

Abstract

A uniform porous polyaniline-coated fiber for solid-phase microextraction was prepared in nitric acid using an etched stainless steel wire as a substrate (figure). It has a large surface area and long service time for the selective extraction and sensitive determination of bisphenol A in complex matrices.

A new nitrogen-containing carbon nanoparticle coated stainless steel fiber for selective solid-phase microextraction of ultraviolet filters

“…1b) shows a rough and porous surface structure, providing the desired contact surface area for subsequent strong adhesion of the PANI coating to the SS wire. 4 Fig. 1c shows the PANI nanoparticle (250 nm-500 nm in diameter) coating electrodeposited onto the surface of the etched SS wire.…”

“…1 Since its introduction, it has gained tremendous attention and found widespread applications. [2][3][4] This technique is based on the distribution equilibrium of analytes between the matrix and a ber coating. Therefore the type, microstructure and properties of the ber coating play a crucial role in the microextraction process.…”

“…27 In SPME, a stainless steel (SS) wire was frequently used as a supporting substrate for the preparation of PANI coated bers via electropolymerization due to its high mechanical and chemical stability, moderate elasticity and low cost. 4,[29][30][31][32] In this case, rm and uniform nitrogen-containing CN coatings will be obtained on the SS wire if PANI coated SS (PANI/SS) bers with special structures and unique surface properties are carbonized by heating in an inert atmosphere. 27 These nitrogen-containing CN coatings offer a large surface area and high chemical stability which are ideal for a potential ber coating material for SPME.…”

Optimization of Glucose Powered Biofuel Cell Anode Developed by Polyaniline-Silver as Electron Transfer Enhancer and Ferritin as Biocompatible Redox Mediator

“…Polyaniline-Silver (PANI-Ag) is utilized as a conductive material for providing a better communication between redox active site of the enzyme and the surface of electrode 31 . PANI is a commonly used conducting polymer, which has efficient abilities to transfer energy due to its exceptionally porous nanostructure and outstanding electronic properties 32 , 33 . Furthermore, incorporation of metals like gold, platinum, silver etc., into the polymeric material, has been revealed to be a simple and efficient technique to greatly improve the electrical properties of polymers for realizing a wide range of applications 34 – 36 .…”