Deposition amount and dissipation kinetics of difenoconazole and propiconazole applied on banana with two commercial spray adjuvants.
Deposition amount and dissipation kinetics of difenoconazole and propiconazole applied on banana with two commercial spray adjuvants.
复制标题
两种市售喷雾助剂苯醚甲环唑和丙环唑在香蕉上的沉积量和消散动力学
作者：
建立了同时测定香蕉基质中苯醚甲环唑和丙环唑残留量的GC-MS/MS方法，苯醚甲环唑和丙环唑在不同基质中的平均回收率为76.7%~94.9%。相对标准偏差在0.9%~7.4%之间。研究了添加有机硅和矿物油助剂对香蕉叶中苯醚甲环唑和丙环唑残留量的影响。有机硅和矿物油辅助处理2小时后的初始沉降量是水处理后的1.22~2.13倍。加入两种喷雾助剂后，两种农药在3个样品上2小时内的残留量大小顺序为树叶、土壤和果实。在中国香蕉两个典型产区，三种处理的降解半衰期均在1.91~7.30天。两种农药在水处理组和矿物油处理组的降解半衰期相似。但有机硅能明显延长苯醚甲环唑在香蕉叶片上的半衰期。14天后，苯醚甲环唑和丙环唑在香蕉果实上的最终残留量为≤0.1mgkg1(−)。这项工作的结果可能有助于苯醚甲环唑和丙环唑在香蕉生产中的安全使用，特别是与有机硅和矿物油助剂一起使用时。
A rapid and sensitive method for the simultaneous determination of difenoconazole and propiconazole residues in banana matrices was established using GC-MS/MS. The average recovery rates of difenoconazole and propiconazole from various matrices ranged from 76.7% to 94.9%. The relative standard deviation was between 0.9% and 7.4%. The effect of adding organosilicon and mineral oil adjuvants after being applied to the residues of difenoconazole and propiconazole in banana leaves was examined. The initial deposition amount 2 hours after the adjuvant treatment with organosilicon and mineral oil was 1.22–2.13 times higher than that after water treatment. After adding the two spray adjuvants, the residues of the two pesticides at 2 hours on three samples followed the order leaves > soil > fruit. The degradation half-lives of the two pesticides were in the range of 1.91–7.30 days for all the three treatments in two typical banana-growing areas in China. The degradation half-lives of the two pesticides in the water treatment group and the mineral oil treatment group were similar. However, organosilicon could apparently increase the half-life of difenoconazole on banana leaves. The final levels of difenoconazole and propiconazole residues on whole banana fruits were ≤0.1 mg kg−1 (MRL) 14 days after application. The results of this work may aid the safe use of difenoconazole and propiconazole in banana production, especially when used with organosilicon and mineral oil adjuvants.
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影响因子：
0.7
作者：
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