ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Electrospun PVC/EVA/CS/Str nanofibers: an efficient sorbent for extraction of trace level of Atrazine and Ametryn in food samples

Fatemeh Nejabati, Shima Amini, and Homeira Ebrahimzadeh

Department of Analytical Chemistry and Pollutants, Faculty of Chemistry and Petroleum Sciences, Shahid Beheshti University, Tehran, Iran

E-mail: h-ebrahim@sbu.ac.ir

Received: 28 April 2023  Accepted: 18 July 2023

Abstract:

An electrospun composite of polyvinyl chloride/ethylene–vinyl acetate/chitosan/starch (PVC/EVA/CS/Str) was synthesized and used as a novel sorbent for thin-film micro-solid-phase extraction (TFME) of atrazine (ATZ) and ametryn (AMT) prior to corona discharge ion mobility spectrometry (CD-IMS) analysis. The fabricated sorbent was characterized using scanning electron microscopy, Fourier transform infrared spectroscopy and X-ray diffraction. Based on the investigations, thanks to the presence of CS/Str, the synthesized composite nanofiber exhibited high porosity, large surface area and acceptable reusability. Also, the sorbent provided various interactions with the intended analytes (hydrogen bonding, hydrophobic contacts and π-π stacking interactions), resulting in the improvement of extraction efficiency. Effective factors on adsorption and desorption steps were optimized by using both one at time method and design-expert. Under the optimum conditions, the linear range was 8.0–300.0 ng mL⁻¹ with coefficient of determination (r²) ≥ 0.9821. Limits of detection (LOD) based on S/N = 3 were 2.5 ng mL⁻¹ and 2.3 ng mL⁻¹ for ATZ and AMT, respectively. The relative standard deviations were in range of 4.8–7.0%. Finally, the efficiency of the TFME-CD-IMS method was evaluated for the determination of ATZ and AMT in tea, milk, farm water and vegetable samples with good recoveries (88.6 to 98.1%).

Keywords: Electrospun nanofibers; Micro-solid-phase extraction; Polyvinyl chloride; Atrazine; Ametryn; Food analysis

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-023-02991-1

Chemical Papers 77 (11) 6991–7002 (2023)