College of Agricultural Sciences, Jiangxi Agricultural University, Nanchang 330045, China.
College of Land Resources and Environment, Jiangxi Agricultural University 330045, China.
Food Chem. 2022 Jan 15;367:130734. doi: 10.1016/j.foodchem.2021.130734. Epub 2021 Jul 30.
Isocycloseram is a new isoxazoline insecticide that can efficiently control the diamondback moth in cruciferous crops. The aim of this study was to establish a method for the determination of isocycloseram residues in/on cabbage and in the soil using HPLC-UV at 264 nm. A field test was conducted in December 2019 and 2020 to monitor isocycloseram dissipation in Jiangxi, China. Acetonitrile was used to extract isocycloseram from cabbage and soil. C18 and GCB were used to purify cabbage extracts, whereas soil extracts did not require purification. At the addition level of 0.01-1.0 mg/kg, the average recoveries in cabbage and soil were 91.81-109.95% and 89.89-104.08% respectively. After having applied 10% isocycloseram DC, isocycloseram dissipated faster in the cabbage matrix. Isocycloseram residues on cabbage leaves could be removed through simple cleaning methods, especially by soaking in 2% citric acid.
异噁唑烷酮杀虫剂环丙氨嗪可高效防治十字花科蔬菜小菜蛾。本研究旨在建立一种采用高效液相色谱-紫外检测法（HPLC-UV）在 264nm 下测定甘蓝和土壤中环丙氨嗪残留量的方法。2019 年 12 月和 2020 年在中国江西进行了田间试验，以监测环丙氨嗪在江西的消解情况。采用乙腈提取甘蓝和土壤中的环丙氨嗪。C18 和 GCB 用于净化甘蓝提取物，而土壤提取物无需净化。在添加水平为 0.01-1.0mg/kg 时，甘蓝和土壤中的平均回收率分别为 91.81%-109.95%和 89.89%-104.08%。10%环丙氨嗪 DC 处理后，环丙氨嗪在甘蓝基质中消解更快。用简单的清洗方法，尤其是用 2%柠檬酸浸泡，可去除甘蓝叶片上的环丙氨嗪残留。
