Octadecylsilane/Nylon‐6 composite as a thin‐film microextraction sorbent for the determination of bisphenol A in water samples

Abstract

We report on the fabrication of a thin-film composite for the extraction of bisphenol A from aqueous solutions. Nylon-6, C18 particles, and polyethylene glycol were used to prepare the thin film sorbent. Bisphenol A was used as a model compound to evaluate the extraction efficiency of the sorbent. High-performance liquid chromatography with UV detection was used for the analysis. The extraction yield of the sorbent was compared with other thin films fabricated using different sorbents including nanoclay, LiChrolut EN, and multiwalled carbon nanotubes. Experimental parameters affecting the extraction performance (extraction time, desorption condition, sample stirring, and ionic strength of the sample solution) were investigated. The detection limit and the dynamic range of the method were 0.05 and 0.15-50 μg/L, respectively. The relative standard deviation of the method at two concentration levels (0.5 and 20 μg/L) was less than 7.2%. Finally, a polycarbonate baby bottle, river water, and wastewater samples were analyzed by the method.

Electrospun polyacrylonitrile‐zeolite imidazolate framework‐8 nanofibers for the thin‐film microextraction of bisphenol A

“…Based on the data (Supporting Information Figure S4), the analytical signal reduced in the presence of salt. Sample solution viscosity and the adsorption of sodium sulfate on the surface of the film may be two reasons for the reduction of extraction efficiency . Due to the negative effect of salt on the extraction of BPA, further extractions were done without the addition of sodium sulfate.…”

A high‐throughput screening method for determination of multi‐antibiotics in animal feed

“…Initially, 96-well plate TFME was applied for bioanalysis including urine and plasma [31,32]. Now this method was also applied for sample preparation in many studies which focus on the matrices including water, seawater, groundwater, juice, wine, fruit, and vegetables [30,[33][34][35][36][37].…”

Electrospun polyethylene terephthalate/graphene oxide nanofibrous membrane followed by HPLC for the separation and determination of tamoxifen in human blood plasma

“…Electrospun nanofibrous membranes show some unique features due to interconnected open pores, a large surface area, high porosity and high permeability . In electrospinning, the diameter of the adsorbent (fiber) and its pore size can be controlled by changing the synthesis conditions including instrument parameters and solution concentration . In addition, the presence of some functional groups and changes in the structure of the electrospun nanofiber membranes can lead to its selective separation.…”