A new sensitive layer based on clcinated Zn/Ti-MOF/magnetic molecularly imprinted polypyrrole: Application to preconcentration and electrochemical determination of perfluorooctane sulfonic acid by magnetic carbon paste electrode

Mosayeb Rezaei; Mehrnaz Ghanavati; Nasim Mohammadi; Sanaz Khani; Sana Nasirimoghadam; Erfan Smiley; Asal Basiryanmahabadi

doi:10.1016/j.talanta.2024.126229

A new sensitive layer based on clcinated Zn/Ti-MOF/magnetic molecularly imprinted polypyrrole: Application to preconcentration and electrochemical determination of perfluorooctane sulfonic acid by magnetic carbon paste electrode

Talanta. 2024 May 14:276:126229. doi: 10.1016/j.talanta.2024.126229. Online ahead of print.

Authors

Mosayeb Rezaei¹, Mehrnaz Ghanavati², Nasim Mohammadi³, Sanaz Khani⁴, Sana Nasirimoghadam⁵, Erfan Smiley², Asal Basiryanmahabadi⁶

Affiliations

¹ Knowledge-based Department, Farapol Jam Chemical Industrial, Hamedan, Iran. Electronic address: mosayebrezaei@gmail.com.
² Department of Analytical Chemistry, Faculty of Chemistry, Islamic Azad University, North Tehran Branch, Tehran, Iran.
³ Department of Chemistry, Faculty of Sciences, Persian Gulf University, Bushehr, Iran.
⁴ Department of Chemistry, Semnan University, Semnan, Iran.
⁵ Department of Chemistry, Islamic Azad University, Science and Research Branch, Tehran, Iran.
⁶ Department of Applied Chemistry, Faculty of Chemistry, Islamic Azad University, North Tehran Branch, Tehran, Iran.

PMID: 38749158
DOI: 10.1016/j.talanta.2024.126229

Abstract

In this research, a new approach based on magnetic electrodes has been developed for the determination of per-fluorooctane sulfonic acid (PSOF). Zinc and Titanium-based Metal-organic framework (MOF) was synthesized and used with polypyrrole as a conductive polymer for preparation of the absorbent to achieve the best performance for electrochemical application. The response of the electrode for determination of the PFOS was affected and optimized by different factors such as buffer solution, pH of the solution, amount of absorbent, extraction time of absorbent, accumulation time, as well as the Square Wave Voltammetry (SWV) instrumental parameters including voltage step, pulse amplitude, frequency and resting time. In the optimum condition, the response of the Zn/Ti/C-MOF-magnetic molecular imprinting polymer/carbon paste electrode (MOFMMIP/CPE) has increased logarithmically by increasing the concentration in the range of 0.002-165 μM by the limit of detection (LOD) of 0.7 nM. The obtained percentage of Recovery (96.00-104.14 %), Bias (-4.00 - 4.14 %) and Relative Standard Deviation (RSD) (1.89-3.74 %) for determination of the PFOS in real and spiked tap water, river water and well water samples demonstrates that the proposed method has an acceptable precision. The comparison between the gained data by the presented method and High-performance liquid chromatography (HPLC) showed that the presented method has high accuracy.

Keywords: Magnetic electrode; Metal-organic framework; Perfluorooctane sulfonic acid; Preconcentration; Voltammetric determination.