Application of activated carbon-decorated polyacrylonitrile nanofibers as an adsorbent in dispersive solid-phase extraction of fluoroquinolones from wastewater

Publication date: Available online 10 January 2019Source: Journal of Pharmaceutical AnalysisAuthor(s): K. Mogolodi Dimpe, Philiswa N. NomngongoAbstractA cheap and simple sample preparation method, consisting of a dispersive solid-phase method and an adsorbent, activated carbon decorated PAN nanofibers, was employed and used for the extraction of antibiotics (ciprofloxacin, danofloxacin, and enrofloxacin) in wastewater. Electrospun PAN nanofibers that were decorated with activated carbon produced from waste tires were used as the solid phase and the antibiotics analyzed by using high-performance liquid chromatography. Parameters such as pH, mass of adsorbent (MA), extraction volume (EV), and extraction time (ET) were optimized owing to their potential effect on the extraction of antibiotics from water. The recovery of all antibiotics was satisfactory, in the range of 90%–99%. The limits of detection and quantification were 0.05, 0.11, 0.20, and 0.53, 1.21, 2.17 µg/L-, respectively. The precision was determined from the repeatability and reproducibility and expressed as the intraday (n=20) and inter-day (n=5) precision. The intraday and inter-day precision was reported in terms of the percentage relative standard deviation, which were 3% and 4%, respectively. The adsorption capacity of the activated carbon-decorated PAN nanofibers was satisfactory, and the reusability of the adsorbent was impressive when reused ten times. The accuracy of the dispersive solid phase extra...
Source: Journal of Pharmaceutical Analysis - Category: Drugs & Pharmacology Source Type: research