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Abstract

Objective: To detect eight kinds of insecticides in dairy products (pure milk, fermented milk, milk powder) rapidly. Methods: A high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) method based on dispersive solid phase extraction pre-treatment technology was established. The samples were extracted with acetonitrile-acetone solution (Vacetonitrile∶Vacetone=80∶20) in ultrasonic way, and the extraction solution was purified by Florisil, primary secondary amine and anhydrous MgSO4.After purification, the samples were analyzed by HPLC-MS/MS qualitatively and quantitatively in multi reaction monitoring (MRM) mode. Results: The correlation coefficient (r) of fenamiphos, imidacloprid, spinosad, dinotefuran, emamectin benzoate, methomyl, thiacloprid and oxamyl in the linear range of 2.00~100 μg/L was greater than 0.99,the limits of detection were 0.010~0.30 μg/kg, the recoveries of method were 82.6%~97.5%, and the relative standard deviations (RSDs) were 1.2%~4.6% (n=6). Conclusion: The method is simple, rapid, sensitive and reproducible. It is suitable for the rapid screening of insecticides in dairy products.

Publication Date

12-28-2022

First Page

44

Last Page

49

DOI

10.13652/j.spjx.1003.5788.2022.80819

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