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Baqiyatallah University of Medical Sciences

A nanocomposite prepared from a zinc-based metal-organic framework and polyethersulfone as a novel coating for the headspace solid-phase microextraction of organophosphorous pesticides

(2018) A nanocomposite prepared from a zinc-based metal-organic framework and polyethersulfone as a novel coating for the headspace solid-phase microextraction of organophosphorous pesticides. Microchimica Acta. p. 8. ISSN 0026-3672

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A nanocomposite prepared from a zinc-based metal-organic framework and polyethersulfone as a novel coating for the headspace solid-phase microextraction of organophosphorous pesticides.pdf

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Abstract

The authors describe a zinc-based metal-organic framework/polyethersulfone nanocomposite (TMU-4/PES) coating deposited on a stainless steel wire via a single-phase inversion method. The nanocomposite represents a novel fiber coating for headspace solid-phase microextraction of organophosphorous pesticides (OPPs) from environmental water and soil samples. The synergistic effects of the high surface area and unique porous structure of TMU-4 as well as the rich pi electron stacking and mechanical attributes of the PES polymer result in a high affinity of the composite for OPPs. Following thermal desorption, the OPPS were quantified by gas chromatography with a nitrogen-phosphorus detector. The preparation of the coating is simple, and the coated fiber is highly stable and reusable in that it can be used in about 100 consecutive extractions/desorption cycles. A central composite design was used for assessing the effect of the experimental parameters on the extraction process. Under optimized conditions, the limits of detection are in the 5-8 ng mL(-1) range for the OPPs diazinon, fenitrothion, malathion and chlorpyrifos. The average repeatability and fiber-to-fiber reproducibility are 6.5 and 8.7, respectively. The method was applied to the trace determination of OPPs in (spiked) water and soil samples where it gave good recovery (88-108) and satisfactory reproducibility (5.9-10.1).

Item Type: Article
Keywords: Sample preparation Gas chromatography Nitrogen-phosphorus detector Water Soil Central composite design gas-chromatographic determination liquid-liquid microextraction water samples extraction fiber optimization insecticides composite residues Chemistry
Divisions:
Page Range: p. 8
Journal or Publication Title: Microchimica Acta
Journal Index: ISI
Volume: 185
Number: 1
Identification Number: https://doi.org/10.1007/s00604-017-2607-3
ISSN: 0026-3672
Depositing User: مهندس مهدی شریفی
URI: http://eprints.bmsu.ac.ir/id/eprint/3981

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