农药学学报2020，Vol.22Issue(2)：388-396,9.DOI:10.16801/j.issn.1008-7303.2020.0069
二氯喹啉草酮在水稻植株上的消解动态及其在稻秆、稻谷和土壤中的最终残留
Dissipation dynamic of quintrione in rice plants and terminal residue in rice straw, grain and soil
摘要
Abstract
Quintrione (2-(3,7-dichloroquinoline-8-carbonyl) cyclohexane-1,3-dione) is a new post-emergence herbicide just approved by Ministry of Agriculture and Rural Affairs in China. However, the potential environmental pollution caused by quintrione has not been investigated to date. A combinedhigh-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) and modified quick, easy, cheap, effective, rugged, and safe (QuEChERS) method was developped for the analysis of quintrione residue in rice plant, grain and soil. The dissipation and terminal residues of quintrione in rice plant were determined by using this method. Results showed that there was a good linear correlation between the concentrations and peak areas with R2 higher than 0.99. The average recoveries of quintrione in rice plant, soil, paddy water, paddy hull and brown rice varied from 78％ to 99％ with the relative standard deviation (RSD) ranged from 3.9％ to 11％. The limits of quantification (LOQ) of quintrione in rice plant, soil, paddy water, paddy hull and brown rice were all 0.002 mg/kg. The investigation of dissipation dynamic data revealed that quintrione degraded quickly in rice plants with half-life (t1/2) values betwwen 6.7 to 12.8 days. 96 days after quintrione application at 900 and 1350 g a.i./ha on rice seedling, no terminal residual was detected in paddy soil, paddy hull, or brown rice samples. The study will contribute to the setting of the maximum residue limits (MRL) of quintrione in rice and the field application strategy.关键词
高效液相色谱-串联三重四极杆质谱/消解动态/二氯喹啉草酮/水稻植株/土壤/残留Key words
high-performance liquid chromatography-tandem mass spectrometry/dissipation dynamic/quintrione/rice plant/soil/residue分类
化学化工引用本文复制引用
周勇,邓希乐,马海昊,朱航,刘佳,周小毛,柏连阳..二氯喹啉草酮在水稻植株上的消解动态及其在稻秆、稻谷和土壤中的最终残留[J].农药学学报,2020,22(2):388-396,9.基金项目
National Key Research and Development Project of China (2017YFD0200308) （2017YFD0200308）
Hunan Agricultural Science and Technology Innovation Fund (2017XC11) （2017XC11）
