| Autor: |
Sun SR; College of Environmental Science and Engineering, Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China., Sun QY; Shandong Institute of Metrology, Jinan 250014, China., Liu F; Quality Department, Sinotruk Jinan Truck Co., Ltd., Jinan 250000, China., Zhao YF; College of Environmental Science and Engineering, Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China., Wang XL; College of Environmental Science and Engineering, Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China., Jiang HL; College of Environmental Science and Engineering, Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China., Li N; College of Environmental Science and Engineering, Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China., Wu YN; China National Center for food safety Risk Assessment, Beijing 100022, China., Liu L; College of Environmental Science and Engineering, Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China., Zhao RS; College of Environmental Science and Engineering, Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China. |
| Abstrakt: |
Neonicotinoid insecticides (NNIs) are extensively utilized globally because of their efficient and broad-spectrum properties. However, their residues are also extensively distributed in the environment. Herein, MIL-101-SO 3 Na with abundant -NH- and sulfonate groups was synthesized via chloromethylation and nucleophilic substitution postmodification strategies and used to extract NNIs via solid-phase extraction. MIL-101-SO 3 Na was enhanced by introducing C-H···N hydrogen bonds to strengthen interaction forces and -SO 3 Na groups to adjust surface charge and enhance electrostatic attraction. This modification and the substantial specific surface area (998 m 2 ·g -1 ) of the metal-organic framework markedly enhanced the enrichment efficiency of MIL-101. The proposed method based on MIL-101-SO 3 Na exhibited a minimal detection threshold (0.04-0.87 ng·L -1 ), an extensive linear spectrum (1-2000 ng·L -1 ), and notable accuracy (a variation of 3.02-11.8%) in water and drink samples. NNI concentrations between 0.25 and 24.2 ng·L -1 in fruit juice and tea samples were accurately identified using the proposed method, demonstrating its feasibility in practical applications. The postmodification of MIL-101-SO 3 Na is an exceptional and promising approach for the sensitive detection of ultratrace NNI levels in complex matrices. |
