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Nanomaterials 2018, 8(5), 302; https://doi.org/10.3390/nano8050302

Carbon-Based Fe3O4 Nanocomposites Derived from Waste Pomelo Peels for Magnetic Solid-Phase Extraction of 11 Triazole Fungicides in Fruit Samples

1,†
,
2,†
,
3,* , 3
and
1,4,*
1
College of Horticulture and Landscape Architecture, Southwest University, Chongqing 400716, China
2
Chongqing Key Laboratory of Economic Plant Biotechnology, Collaborative Innovation Center of Special Plant Industry in Chongqing, Institute of Special Plants, Chongqing University of Arts and Sciences, Yongchuan 402160, China
3
The Inspection Technical Center of Chongqing Entry-Exit Inspection & Quarantine Bureau, Chongqing 400020, China
4
Key Laboratory of Horticulture Science for Southern Mountainous Regions, Ministry of Education, Chongqing 400715, China
These authors contributed equally to this work.
*
Authors to whom correspondence should be addressed.
Received: 29 March 2018 / Revised: 26 April 2018 / Accepted: 1 May 2018 / Published: 6 May 2018
(This article belongs to the Special Issue Preparation and Application of Hybrid Nanomaterials)
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Abstract

Carbon-based Fe3O4 nanocomposites (C/Fe3O4 NCs) were synthesized by a simple one-step hydrothermal method using waste pomelo peels as the carbon precursors. The characterization results showed that they had good structures and physicochemical properties. The prepared C/Fe3O4 NCs could be applied as excellent and recyclable adsorbents for magnetic solid phase extraction (MSPE) of 11 triazole fungicides in fruit samples. In the MSPE procedure, several parameters including the amount of adsorbents, extraction time, the type and volume of desorption solvent, and desorption time were optimized in detail. Under the optimized conditions, the good linearity (R2 > 0.9916), the limits of detection (LOD), and quantification (LOQ) were obtained in the range of 1–100, 0.12–0.55, and 0.39–1.85 μg/kg for 11 pesticides, respectively. Lastly, the proposed MSPE method was successfully applied to analyze triazole fungicides in real apple, pear, orange, peach, and banana samples with recoveries in the range of 82.1% to 109.9% and relative standard deviations (RSDs) below 8.4%. Therefore, the C/Fe3O4 NCs based MSPE method has a great potential for isolating and pre-concentrating trace levels of triazole fungicides in fruits. View Full-Text
Keywords: carbon based Fe3O4 nanocomposites; pomelo peels; magnetic solid phase extraction; triazole fungicides carbon based Fe3O4 nanocomposites; pomelo peels; magnetic solid phase extraction; triazole fungicides
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Ren, K.; Zhang, W.; Cao, S.; Wang, G.; Zhou, Z. Carbon-Based Fe3O4 Nanocomposites Derived from Waste Pomelo Peels for Magnetic Solid-Phase Extraction of 11 Triazole Fungicides in Fruit Samples. Nanomaterials 2018, 8, 302.

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