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A star-shaped polythiophene dendrimer coating for solid-phase microextraction of triazole agrochemicals

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Abstract

A nanostructured star-shaped polythiophene dendrimer was prepared and used as a fiber coating for headspace solid phase microextraction of selected triazolic pesticides (tebuconazole, hexaconazole, penconazole, diniconazole, difenoconazole, triticonazole) from water samples. The dendrimer with its large surface area was characterized by thermogravimetric analysis, UV–Vis spectroscopy and field emission scanning electron microscopy. It was placed on a stainless steel wire for use in SPME. The experimental conditions for fiber coating, extraction, stirring rate, ionic strength, pH value, desorption temperature and time were optimized. Following thermal desorption, the pesticides were quantified by GC-MS. Under optimum conditions, the repeatability (RSD) for one fiber (for n = 3) ranges from 4.3 to 5.6%. The detection limits are between 8 and 12 pg mL−1. The method is fast, inexpensive (in terms of equipment), and the fiber has high thermal stability.

Schematic presentation of a nanostructured star-shaped polythiophene dendrimer for use in headspace solid phase microextraction of the triazolic pesticides (tebuconazole, hexaconazole, penconazole, diniconazole, difenoconazole, triticonazole). They were then quantified by gas chromatography–mass spectrometry.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, University of Maragheh, PO Box: 5518183111, Maragheh, Iran

    Mir Mahdi Abolghasemi, Rahim Habibiyan & Marzieh Piryaei

  2. Immunology Research Center, Tabriz University of Medical Sciences, PO Box: 5165665811, Tabriz, Iran

    Mehdi Jaymand

Authors
  1. Mir Mahdi Abolghasemi
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  2. Rahim Habibiyan
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  3. Mehdi Jaymand
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  4. Marzieh Piryaei
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Correspondence to Mir Mahdi Abolghasemi.

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Abolghasemi, M.M., Habibiyan, R., Jaymand, M. et al. A star-shaped polythiophene dendrimer coating for solid-phase microextraction of triazole agrochemicals. Microchim Acta 185, 179 (2018). https://doi.org/10.1007/s00604-017-2639-8

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  • DOI: https://doi.org/10.1007/s00604-017-2639-8

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