ABSTRACT To explore the residual level and dietary intake risk of thifluzamide in peanut, an easy and rapid QuEChERS bases UPLC–MS/MS method was developed, and a field experiment was carried out in 9 main peanut producing areas in China. In the sample preparation process, acetonitrile was used as extractant, and PSA, C18 were used as adsorbents. The average recovery for peanut kernel and straw were between 77.8 and 100.5 with a relative standard deviation less than17.3. The matrix matching curve showed good linearity, with the determination coefficient (R2) ≥0.9941. And the LOQ of peanut kernel and peanut straw were 0.005 mg kg–1 and 0.01 mg kg–1, respectively. The field experiment results showed that the final thifluzamide residue in the peanut straw during harvest ranged from < LOQ to 0.114 mg kg–1. For peanut kernels, the residues in Beijing, Guizhou, Shandong, Henan, Guangxi and Jilin were all lower than LOQ, while residues in Guangdong, Anhui and Hunan were detected in the range of 0.005–0.023?mgkg?1. Residues in peanut kernels were used to estimate the potential health risks of thifluzamide. The results of dietary risk of peanuts were all less than 1, which indicated that the final harvest of thifluzamide residues in peanut would not cause risk to consumers.
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