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

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.