Abstract:

The objective of this study was to collect and analyze residue data of carbendazim, thiabendazole and prochlorazin edible fungi in Beijing plantation woodlands. Samples were extracted with acetonitrile, cleaned up by mixed PSA andMCX dispersive solid-phase extraction, separated by ultra performance liquid chromatography, detected using a triplequadrupole mass spectrometer under the multi-reaction monitoring model, and quantitatively analyzed with externalstandard method using matrix-match standard solution. Average recoveries in samples ranged from 74% to 100% at threespiked levels from 0.01 to 1.0 mg/kg, with relative standard deviations varying from 2% to 13.0%. Thiabendazole residuesin the tested samples were below 0.01 mg/kg, carbendazim residues ranged from 0.01 to 0.42 mg/kg and prochloraz residuesranged from 0.01 to 0.51 mg/kg, which were all less than their maximum residue limits in edible fungus (5.0, 1.0 and2.0 mg/kg, respectively). Based on these results, the three pesticides residues were safe for the edible fungi in Beijingplantation woodlands.

Key words: ultra performance liquid chromatography-triple quadrupole mass spectrometry (UPLC-MS-MS), carbendazim;thiabendazole, prochloraz, edible fungus