Simple Magnetic Polymeric Ionic Liquid Nanocomposite Coated Hollow Fiber Membrane for the Determination of Lead (II) and Copper (II) in Water and Fruit Juice with Microinjection Sampling-Flame Atomic Absorption Spectrometry (MIS-FAAS)

Abstract

A novel and effective adsorbent based on magnetic polymeric ionic liquid nanocomposite-coated hollow fiber membrane (MPILNC-HFM) was developed and applied for magnetic solid phase extraction of Pb (II) and Cu (II) from environmental water and fruit juice samples with microinjection sampling-flame atomic absorption spectrometry (MIS-FAAS). During extraction process, the adsorbent coated on the surface of the hollow fiber can be removed from the solution using tweezers without using a magnet. Additionally, the need to use a centrifuge during adsorption and desorption steps is also eliminated, thereby increasing the speed, simplicity, and efficiency of the extraction process. The nanocomposite characterized through Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and energy-dispersive x-ray (EDX) analyses to ensure its applicability. The experimental parameters were optimized by applying one-variable-at the-time (OVAT) approach. Under optimal conditions, limits of detection were achieved 16.5 µg L⁻¹ for Pb (II) and 20.4 µg L⁻¹ for Cu (II), respectively, with relative standard deviations up to 7.9% and relative recoveries in the range of 91.8%–02.2%.

Keywords:

• Heavy metals
• hollow fiber membrane
• magnetic polymeric ionic liquid
• magnetic solid phase extraction (MSPE)
• microinjection sampling injection-flame atomic absorption spectrometry (MIS-FAAS)

Acknowledgments

The authors would like to thank Turkey Scholarship program for the provided fellowship. The authors would like to thank Pamukkale University Science Faculty Department of Chemistry for allowing access to use their available instrumentation. The authors would like to thank Advanced Technology Application and Research Center (ILTAM) for SEM analysis and the interpretation of the results.

Disclosure statement

No potential conflict of interest was reported by the author(s).