Residues and dietary risk assessment of oxvfluorfen in ginger
In order to explore the terminal residue and safety of oxyfluorfen in ginger,a detection method for oxyfluorfen residues in ginger was established.In addition,a residue experiment of oxy fluorfen EC on ginger was carried out,and the final residue data obtained were used to evaluate the chronic dietary intake risk based on the dietary data of Chinese residents and the risk assessment model.The oxyfluorfen was extracted with acetonitrile,purified with N-propyl ethylene-diamine(PSA),C18 and graphitized carbon black(GCB),and detected by ultra-performance liquid chromatography-tan-dem mass spectrometry(UPLC-MS/MS).At the spiked levels of 0.01,0.05,and 0.10 mg·L-1,the recoveries of oxyfluorfen were between 93％and 97％,with the RSDs in the range of 2.6％to 8.1％.In Shandong,Anhui,Hunan,and Guizhou prov-inces,240 g·L-1 oxyfluorfen EC was sprayed once with 180 g·hm-2 after sowing and pre-emergence.The terminal residue of oxyfluorfen in ginger during the harvest period was lower than the maximum residue limit(MRL,0.01 mg·kg-1)of China and European Union(EU).The NEDI of oxyfluorfen in the general population was 0.019 5 mg,accounting for 1.03％of the acceptable daily intake(ADI).The contribution of oxyfluorfen residues in ginger to chronic dietary risk was only 0.46％,indicating that it would not affect the health of the general population.This study provided essential data for the scientific and rational use of oxyfluorfen on ginger,a small specialty crop in China.
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万方数据
