Journal
FOOD CHEMISTRY
Volume 270, Issue -, Pages 204-213Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2018.07.068
Keywords
Honey; Royal-jelly; Neonicotinoid insecticides; Metabolites; LC-MS/MS
Funding
- AQSIQ [2016IK280]
- ZJCIQ [ZK 201710X]
- Science Technology Department of Zhejiang Province [2017C37011, 2017C37058]
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An analytical method based on liquid chromatography-tandem mass spectrometry (LC-MS/MS) method was developed for the first simultaneous determination of ten neonicotinoid insecticides (pymetrozine, dinotefuran, nitenpyram, thiamethoxam, flonicamid, imidacloprid, clothianidin, imidaclothiz, acetamiprid, thiacloprid) and two metabolites (4-trifluoromethylnicotinamide and N-desmethylacetamiprid) in honey and royal-jelly. The quantitative detection was performed by LC-MS/MS on multiple reaction monitoring (MRM) mode under positive-ion electrospray ionization. The isotope dilution internal standard method or external standard method was used for quantitation analysis. The limits of quantification (LOQs), calculated as 10 times the standard deviation, were 0.25-5.0 mu g kg(-1) for ten neonicotinoid insecticides and two metabolites. The average recoveries were in the range of 72.8-106.5%, with relative standard deviations (RSDs) below 13.8%, measured at three concentration levels. The developed method exhibits a high sensitivity and suitable for the simultaneous determination of neonicotinoid insecticides and metabolites in honey and royal-jelly.
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