Analytical Method of Carbendazim and Thiophanate-methyl Residues in Tomato and Soil

[Aims] The HPLC method was developed for simultaneous rapid determination of carbendazim and thiophanate-methyl residues in tomato and soil. [Methods] The samples were extracted using dichloromethane, cleaned up by silica solid phase extraction column and fi nally detected by HPLC. [Results] When spiked at 0.1-1.0 mg/kg, the recovery of carbendazim for tomato and soil were 86.96-97.91%, 87.92-103.87%, respectively, and relative standard deviation were 0.56-2.16%, 1.02-1.87%, respectively. The recovery of thiophanate-methyl for tomato and soil were 85.09-87.11%, 84.64-85.96%, respectively, and relative standard deviation were 0.82-2.58%, 0.36-3.98%, respectively. The residues of carbendazim and thiophanate-methyl in tomato and soil were detected using this method in 2012. The results show that the final residues of two pesticides in tomato and soil are lower than the MRLs of China. [Conclusions] The method is fast, simple, accurate and reliable.