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Magnetic chitosan-based solid-phase extraction for the determination of pesticides in water samples.

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Τίτλος: Magnetic chitosan-based solid-phase extraction for the determination of pesticides in water samples.
Συγγραφείς: Duan S; Beijing Key Laboratory for Forest Pest Control, College of Forestry, Beijing Forestry University, No. 35 Qinghua East Road, Beijing 100083, China., Sui J; Beijing Key Laboratory for Forest Pest Control, College of Forestry, Beijing Forestry University, No. 35 Qinghua East Road, Beijing 100083, China., Ma Q; Beijing Key Laboratory for Forest Pest Control, College of Forestry, Beijing Forestry University, No. 35 Qinghua East Road, Beijing 100083, China., Zhang Z; Beijing Key Laboratory for Forest Pest Control, College of Forestry, Beijing Forestry University, No. 35 Qinghua East Road, Beijing 100083, China., Zhao W; Beijing Key Laboratory for Forest Pest Control, College of Forestry, Beijing Forestry University, No. 35 Qinghua East Road, Beijing 100083, China., Li S; Beijing Key Laboratory for Forest Pest Control, College of Forestry, Beijing Forestry University, No. 35 Qinghua East Road, Beijing 100083, China. Electronic address: songqingli@bjfu.edu.cn., Tao J; Beijing Key Laboratory for Forest Pest Control, College of Forestry, Beijing Forestry University, No. 35 Qinghua East Road, Beijing 100083, China., Zong S; Beijing Key Laboratory for Forest Pest Control, College of Forestry, Beijing Forestry University, No. 35 Qinghua East Road, Beijing 100083, China.
Πηγή: Journal of chromatography. A [J Chromatogr A] 2026 Aug 30; Vol. 1783, pp. 467138. Date of Electronic Publication: 2026 May 26.
Τύπος έκδοσης: Journal Article
Γλώσσα: English
Στοιχεία περιοδικού: Publisher: Elsevier Country of Publication: Netherlands NLM ID: 9318488 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1873-3778 (Electronic) Linking ISSN: 00219673 NLM ISO Abbreviation: J Chromatogr A Subsets: MEDLINE
Imprint Name(s): Original Publication: Amsterdam ; New York : Elsevier, 1993-
Ιατρικοί όροι (MeSH): Solid Phase Extraction*/methods , Chitosan*/chemistry , Water Pollutants, Chemical*/analysis , Water Pollutants, Chemical*/isolation & purification , Water Pollutants, Chemical*/chemistry , Pesticides*/analysis , Pesticides*/isolation & purification , Pesticides*/chemistry , Magnetite Nanoparticles*/chemistry, Adsorption ; Limit of Detection ; Reproducibility of Results ; Linear Models
Περίληψη: In this study, a Fe3O4/chitosan magnetic composite was synthesized via a co-precipitation method and applied to magnetic solid-phase extraction (MSPE) for the determination of four pesticides-chlorbenzuron, bifenthrin, λ-cyhalothrin, and deltamethrin-in water samples. The prepared composite exhibited typical superparamagnetic behavior, with a saturation magnetization of 18.26 emu g-1, enabling rapid solid-liquid separation within approximately 5 s under an external magnetic field. The extraction process was completed within 7 min. Compared with pristine chitosan, the specific surface area of the magnetic composite increased markedly from 0.8675 to 19.7250 m2 g-1. Abundant Fe-OH functional groups on the composite surface provided effective adsorption sites for the target pesticides. Good linearity was achieved for all analytes over the concentration range of 0.11-1000 μg L-1 (R2 ≥ 0.9960). After four consecutive adsorption-desorption cycles, the composite maintained satisfactory recovery performance, demonstrating good reusability. These results indicate that the Fe3O4/chitosan composite is an efficient and environmentally friendly adsorbent. The developed MSPE method offers a simple, rapid, and cost-effective approach for pesticide extraction and determination in water samples, with the added advantages of operational convenience and recyclability. Furthermore, adsorption mechanisms were systematically elucidated using FTIR, XPS, kinetic and isotherm analyses, revealing the involvement of non-covalent interactions (hydrogen bonding, Lewis acid-base interactions, electrostatic interactions, and hydrophobic effects), covalent coordination, and electron transfer. This study provides a valuable reference for the synthesis and application of related magnetic composites and offers mechanistic insights that support the development of green water treatment technologies.
(Copyright © 2026 Elsevier B.V. All rights reserved.)
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Contributed Indexing: Keywords: Adsorbent; Chitosan; Fe(3)O(4); Magnetic solid-phase extraction; Pesticides; Water treatment
Substance Nomenclature: 9012-76-4 (Chitosan)
0 (Water Pollutants, Chemical)
0 (Pesticides)
0 (Magnetite Nanoparticles)
Entry Date(s): Date Created: 20260529 Date Completed: 20260629 Latest Revision: 20260629
Update Code: 20260630
DOI: 10.1016/j.chroma.2026.467138
PMID: 42214143
Βάση Δεδομένων: MEDLINE
Περιγραφή
ISSN:1873-3778
DOI:10.1016/j.chroma.2026.467138