Safe Application of 75% Trifloxystrobin-Tebuconazole as Water-Dispersible Granules in Paddy Based on Residue and Dietary Risk Assessment

文献类型： 外文期刊

第一作者： Wang, Siwei

作者： Wang, Siwei;Liu, Yanping;Zhu, Manshan

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关键词： trifloxystrobin and tebuconazole; paddy; residue distribution; risk assessment; dissipation dynamics

期刊名称：MOLECULES （ 影响因子：4.6； 五年影响因子：4.9 ）

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年卷期： 2024 年 29 卷 1 期

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收录情况： SCI

摘要： The present study describes the development of a highly effective approach for determining the residue distribution and dissipation of trifloxystrobin and tebuconazole, and their risk assessment in brown rice, husk, straw, and grain using high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). The current study provides considerable novel information regarding the safe utilization of a mixture of trifloxystrobin and tebuconazole in paddy production. The samples demonstrated a range of mean recoveries between 72% and 86%, with a 1.1-9.2% relative standard deviation (RSD). The limits of quantification (LOQ) and half-lives (t1/2) for brown rice, husk, straw, and grain were, respectively, established to be 0.001-0.01 mg/kg and 4.1-7.7 days. The concentrations of terminal residues in the brown rice, husk, straw, and grain were, respectively, found to be 0.02-0.05, 0.03-0.11, 0.02-0.07, and 0.02-0.05 mg/kg after being treated twice at 168.75 g a.i./ha with 21 and 28 days of pre-harvest intervals (PHIs). Trifloxystrobin and tebuconazole presented a non-negligible chronic risk to human subjects, as evidenced by a risk quotient (RQ) value of less than 1.

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