Abstract
Eight new generation amide insecticide residues analysis by multiwalled carbon nanotubes (MWCNs) cleanup, combined with QuEChERS and ultrahigh performance liquid chromatography tandem mass spectrometry has been developed and successfully applied in complex matrix such as orange, celery, onion, litchi, mango, shallot, chives, avocado, garlic. The matric effect of MWCNs is optimized and compared with ordinary cleanup materials. The results show that the performance of MWCNs is fine and effectively reduce matrix interference. Through chemical structure skeletons analyzed, chlorantraniliprole, bromoantraniliprole, and cyantraniliprole can cause same product ions of m/z 286.0 or 177.1 in the ESI+ mode, then tetrachlorantraniliprole and cyclaniliprole can produce collective ions of m/z 146.9 in the ESI− mode. The coefficients (R2) were greater than 0.9990, the limit of quantification ranges from 0.03 to 0.80 μg/kg, the recovery rate ranges from 71.2 to 120%, and the relative standard deviation (RSD) ranges from 3.8 to 9.4%. The method is fast, simple, sensitive, and suitable for the rapid determination of amide pesticides in complex matrix agricultural food.
Highlights
Eight new generation amide insecticide residues analysis by multiwalled carbon nanotubes (MWCNs) cleanup, combined with QuEChERS and ultrahigh performance liquid chromatography tandem mass spectrometry has been developed and successfully applied in complex matrix such as orange, celery, onion, litchi, mango, shallot, chives, avocado, garlic
There have been a number of analytical methods for the diamide residue determination, Tian reported simultaneous determination of five diamide insecticides in m ushroom[3], in food m atrices[4,5], chlorantraniliprole and flubendiamide in v egetable[6], chlorantraniliprole and cyantraniliprole in food[7], and in s oil[8]
This study is to develop a method modified QuEChERS for simultaneous determination of eight new generate amide insecticides including chlorantraniliprole, bromoantraniliprole, flonicamid, cyantraniliprole, tolfenpyrad, flubendiamide, tetrachlorantraniliprole and cyclaniliprole in fruits and vegetables by ultrahigh performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS)
Summary
Eight new generation amide insecticide residues analysis by multiwalled carbon nanotubes (MWCNs) cleanup, combined with QuEChERS and ultrahigh performance liquid chromatography tandem mass spectrometry has been developed and successfully applied in complex matrix such as orange, celery, onion, litchi, mango, shallot, chives, avocado, garlic. The early products include chlorantraniliprole, cyantraniliprole, flonicamidand and flubendiamide[1], whereas cyclaniliprole and tetrachlorantraniliprole, bromoantraniliprole are the more recent members. They can activate insect ryanodine receptors, which play a critical role in muscle function[2]. The effects of complex matrix generally will enhance or inhibit mass signal to cause the result error over the method, the complex matrix includes green onions, leeks, citrus
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