Determianion of Spirodiclofen Residue in Nine Fruits by Gas Chromatography-Quadrupole Mass Spectrometry with Dispersive Solid Phase Extraction
An internal standard method was developed for the determination of spirodiclofen residue in nine fruits by gas chromatography-quadrupole mass spectrometry with dispersive solid phase extraction.Spirodiclofen was vortex extracted with acetonitrile and cleaned-up with mixture of two sorbents primary secondary amine(PSA) and octadecyl bonded silica(ODS)-C18,the effects of the clean-up were satisfied.Spirodiclofen was detected in selected ion mode(SIM),the temperatures of inlet,MS quadrupole,MS source and transferline were 280,150,230 and 280 ℃,respectively.The recoveries of spirodiclofen in eight matrices except almond were all between 76.79% and 99.10%,and the correlation coefficients were between 0.6% and 3.9%.The limit of detection concentration and amount of this method were 0.02 mg/Kg and 1×10-10 g,respectively.Triphenyl phosphate(TPP) was used as an internal standard.The matrix effect of spirodiclofen in 9 fruits was studied and the cleavage mechanism of spirodiclofen characteristic fragment ions was also interpreted.