Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2019, Vol. 40 ›› Issue (7): 1434-1440.DOI: 10.3969/j.issn.1000-2561.2019.07.027

• Agricultural Product Processing, Preservation, Storage, Analysis and Detection • Previous Articles     Next Articles

Dissipation, Residues and Dietary Risk Assessment of Dinotefuran in Rice Ecosystem

GE Huilin,XIE Defang,SU Bingxia,LV Daizhu,ZHAO Fangfang   

  1. Analysis and Testing Center, Chinese Academy of Tropical Agricultural Sciences / Hainan Provincial Key Laboratory of Quality and Safety for Tropical Fruits and Vegetables / Laboratory of Quality and Safety Risk Assessment for Tropical Products (Haikou), Ministry of Agriculture and Rural Affairs, Haikou, Hainan 571101, China
  • Received:2017-12-21 Revised:2019-03-30 Online:2019-07-25 Published:2019-08-01


To evaluate the residue behavior and dietary intake risk of the dinotefuran in rice ecosystem, the residual trial of dinotefuran in rice was carried out in Hainan, Hunan and Heilongjiang in 2014. The method for the residue determination of dinotefuran in soil, paddy water, rice plant, brown rice, and rice husk was developed using high performance liquid chromatography with ultraviolet detector (HPLC-UV). The dietary risk assessment for China population based on dinotefuran residues data in rice was investigated. The samples were extracted by acetonitrile, purified by NH2 column, detected by HPLC-UV. Results showed that the limit of detection (LOD) of dinotefuran was 0.08 ng. The limits of quantification (LOQ) of dinotefuran in rice plant, rice husk, brown rice, soil and paddy water was 0.1, 0.1, 0.05, 0.02, and 0.02 mg/kg, respectively. At fortified levels of 0.05 to 2 mg/kg, the average recoveries varied from 75% to 114% with the relative standard deviation of 0.5% to 19.0%. The dissipations of dinotefuran in rice plant, paddy water and soil were basically consistent with the first-order kinetic equation. The corresponding half-lives were about 0.5, 1, and 5 days, respectively. At the 14 th day after the last application, the terminal residues of dinotefuran in rice indicated that the supervised trials median residue (STMR) was 0.058 mg/kg, the highest residue (HR) was 0.13 mg/kg. STMR and HR were all below the Chinese MRL of 1 mg/kg. Risk assessment indicated a lower chronic risk after a long-term dietary intake of dinotefuran in rice for China population.

Key words: dinotefuran, rice, high performance liquid chromatography, residue, dissipation, risk assessment

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