氟啶虫胺腈和乙基多杀菌素在芦笋上的残留及长期膳食风险评估

    Residue and chronic dietary exposure risk assessment of sulfoxaflor and spinetoram in Asparagus officinalis

    • 摘要: 为明确氟啶虫胺腈和乙基多杀菌素在芦笋上的残留膳食风险,分别开展了1年6地240 g/L氟啶虫胺腈悬浮剂和60 g/L乙基多杀菌素悬浮剂的规范残留试验。采用超高效液相色谱-串联质谱 (UPLC-MS/MS),对氟啶虫胺腈和乙基多杀菌素及其代谢物在芦笋中的消解动态、残留水平和长期膳食摄入风险进行了评估。结果表明:在0.005~1.0 mg/kg 3个添加水平下,氟啶虫胺腈和乙基多杀菌素及其代谢物的平均回收率在86%~105%之间,相对标准偏差 (RSD) ≤11%,定量限均为0.005 mg/kg。氟啶虫胺腈和乙基多杀菌素的半衰期分别在1.1~1.9 d之间 和1.3~2.1 d之间,呈现较快的消解趋势;在3 d采样间隔期下,氟啶虫胺腈和乙基多杀菌素及其代谢物在芦笋上的残留量分别在<0.005~0.194 mg/kg之间和<0.01~0.041 mg/kg之间。长期膳食摄入风险评估结果表明,在平均膳食和97.5%分位值膳食消费量下,芦笋中氟啶虫胺腈和乙基多杀菌素残留量对一般人群长期膳食摄入风险的贡献率均不超过0.2%,说明通过芦笋摄入的氟啶虫胺腈和乙基多杀菌素残留对人体产生长期膳食摄入的风险较小。本研究为氟啶虫胺腈和乙基多杀菌素的合理使用提供了依据,为我国制定其在芦笋上的最大残留限量提供了基础数据。

       

      Abstract: To clarify the dietary risk of residues of sulfoxaflor and spinetoram in Asparagus officinalis, supervised residue trials of sulfoxaflor 240 g/L suspension concentration (SC) and spinetoram 60 g/L SC were carried out at six locations over a period of one year. Based on the ultra-high performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS), the dissipation, residue levels and dietary risk of sulfoxaflor, spinetoram and its metabolites in A. officinalis were determined and evaluated. The results showed that the average recoveries of sulfoxaflor, spinetoram and its metabolites in A. officinalis were 86%-105% at three spiked levels (0.005-1.0 mg/kg), and the relative standard deviations (RSD) were lower than 11%. The limits of quantification (LOQ) were 0.005 mg/kg. Following the first-order kinetics, the half-lives of sulfoxaflor and spinetoram were in range of 1.1-1.9 d and 1.3-2.1 d, respectively, showing a rapid dissipation trends. At a sampling interval of 3 days after the last application, the residue levels of sulfoxaflor in A. officinalis samples were<0.005-0.194 mg/kg, and the residues of spinetoram were<0.01-0.041 mg/kg. The chronic dietary intake risk assessment at average and 97.5% food consumption showed that the contribution rate of A. officinalis and spinetoram residues to the ADI for general population were less than 0.2%.These results suggested that the risk of chronic dietary intake of sulfoxaflor and spinetoram residues through A. officinalis were very low. The study provided basic data for the scientific and reasonable use of sulfoxaflor and spinetoram on A. officinalis, and also for the establishment of their maximum residue limits (MRLs).

       

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