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Rapid Enrichment and Sensitive Detection of Trace Chloronicotinyl Insecticide Residues in Honey Samples Based on
Xiao-Li Wang1, Hong-Shuai Geng1, Lu Liu1
1Qilu University of Technology (Shandong Academy of Sciences), Shandong Analysis and Test Center, Key Laboratory for Applied Technology of Sophisticated Analytical Instruments of Shandong Province, Jinan 250014, China.
Abstract:
Establishing an effective method for insecticide residue analysis is critical for food safety control. This study reported a convenient and sensitive approach for extracting and analyzing trace chloronicotinyl insecticides (CNIs) in honey samples. A magnetic covalent organic framework (Fe3O4@PyTTA-DHPA-COFs) was synthesized and employed as an adsorbent in magnetic solid phase extraction (m-SPE). The Fe3O4@PyTTA-DHPA-COFs exhibited efficient and rapid adsorption (5 min) for CNIs. The m-SPE-HPLC-MS/MS method for trace analysis of CNIs in honey samples was established with good linearity (0.5-200 ng g-1) and a low limit of quantitation (0.05-0.95 ng g-1). CNI residues (0.93-4.38 ng g-1) were detected in real honey samples, much lower than the maximum residue levels (MRLs) of CNIs in honey. The recoveries of CNIs in spiked honey samples were 72.1-106% with RSD < 9.5%. The successful application demonstrates the potential of this method in trace analysis of CNIs residues.
