Determination of Carbamate Pesticide Residues in Ginger by QuEChERS-GC-MS
A QuEChERS-gas chromatography-mass spectrometry(GC-MS)method was established for the detection of 8 pesticide residues(probromophos,imidacloprid,dichlorvos,malathion,diclofenac,triazolol,fenitrothion and pentaconazole)in ginger.The sample was extracted with acetonitrile and salt extraction package,purified,detected by GC-MS spectrometry,analyzed by MS under positive ion mode with multiple reaction monitoring,and quantified by internal standard method.The results showed that the method was linear in the concentration range of 0.05～1.00 μg·mL-1 with the correlation coefficients greater than 0.99.The recoveries were in the range of 82.6%～103.0%at the spiked amount of 0.10 mg·kg-1,and the relative standard deviations were in the range of 0.9%～6.4%.The method is fast,efficient,accurate and suitable for the determination of various pesticide residues in ginger.
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