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Chromium-based polypyrrole/MIL-101 nanocomposite as an effective sorbent for headspace microextraction of methyl tert-butyl ether in soil samples

Citation

Darabi, J and Ghiasvand, A, Chromium-based polypyrrole/MIL-101 nanocomposite as an effective sorbent for headspace microextraction of methyl tert-butyl ether in soil samples, Molecules, 25, (3) Article 644. ISSN 1420-3049 (2020) [Refereed Article]


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Copyright 2020 The Authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

DOI: doi:10.3390/molecules25030644

Abstract

The performance of headspace solid-phase microextraction (HS-SPME) was upgraded by easy and low-cost preparation of a new nanocomposite fiber. A polypyrrole/chromium-based metal–organic framework, PPy@MIL-101(Cr), nanocomposite was electrochemically synthesized and simultaneously coated on a steel wire as a microextraction sorbent. The morphology and chemical structure of the prepared nanocomposite was characterized by Fourier-transform infrared spectrometry (FT-IR), scanning electron microscopy (SEM), and energy dispersive X-ray analysis (EDX) techniques. The microsorbent was used for sampling of methyl-tert-butyl ether (MTBE) in solid samples, through an HS-SPME sampling strategy, followed by GC-FID measurement. The optimal experimental conditions, including extraction temperature, extraction time, and GC desorption conditions, were evaluated and optimized. The proposed procedure showed good sensitivity (limit of detection was 0.01 ng·g−1) and precision (relative standard deviation was 8.4% for six replicated analyses). The calibration curve was linear over the range of 5–40,000 ng·g−1, with a correlation coefficient of 0.994. The limit of quantification was 0.4 ng·g−1. The fabricated fiber exhibited good repeatability and reproducibility for the sampling of MTBE, with average recovery values of 88–114%. The intra-fiber and inter-fiber precisions were found to be 8.4% and 19%, respectively. The results demonstrated the superiority of the PPy@MIL-101(Cr)-coated fiber in comparison with handmade (polypyrrole, PPY) and commercial fibers (polyacrylate, PA; polydimethylsiloxane, PDMS; and divinylbenzene/carboxen/polydimethylsiloxane, DVB/CAR/PDMS) for the analysis of solid samples. The developed method was successfully employed for the analysis of MTBE in different soil samples contaminated by oil products.

Item Details

Item Type:Refereed Article
Keywords:MIL-101(Cr), polypyrrole, headspace microextraction, methyl-tert-butyl ether, soil
Research Division:Chemical Sciences
Research Group:Analytical Chemistry
Research Field:Analytical Spectrometry
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
UTAS Author:Ghiasvand, A (Professor Alireza Ghiasvand)
ID Code:137431
Year Published:2020
Web of Science® Times Cited:1
Deposited By:Chemistry
Deposited On:2020-02-13
Last Modified:2020-07-27
Downloads:0

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