农药学学报2017，Vol.19Issue(1)：84-92,9.DOI:10.16801/j.issn.1008-7303.2017.0012
噻呋酰胺在稻田中的残留及消解动态
Residues and decline dynamics of thifluzamide in rice field
摘要
Abstract
An analysis method using gaschromatography-ion trap mass spectrometry (GC-ITMS) was developed for the determination of thifluzamide residues in water, soil, rice, plants and hulls. The residues and decline dynamics of thifluzamide in paddy field were conducted by field experiments. The calibration curve showed a good linearity in the range of 0.03-6 mg/L with the correlation coefficient above 0.99. The average recoveries of thifluzamide in five samples at three spiked levels of 0.03, 0.3 and 3 mg/kg all ranged from 71% to 100%, with the relative standard deviation (RSD) of 1.8% to11.4%. The limits of quantitation (LOQ) in those samples were 0.03 mg/kg. The limit of detection (LOD) was 0.01 mg/kg. The dynamic data were fitted by the first-order kinetics equation and second-order kinetics equation. Results show that the half-lives of thifluzamide were 2.4 to 9.2 d in paddy water, 1.8 to 10.3 d in the soil, and 1.3 to 4.1 d in the plant. And this study demonstrated that if the application rate of thifluzamide was below 169.2 g (a.i)/hm2 with no more than three times application, the thifluzamide residues in rice at harvest time were below Chinese maximum residue limit (3 mg/kg).关键词
噻呋酰胺/气相色谱-离子阱质谱/稻田/残留/消解动态Key words
thifluzamide/gas chromatography-ion trap mass spectrometry/rice field/residue/decline dynamics分类
化学化工引用本文复制引用
曹俊丽,刘新刚,董丰收,徐军,吴小虎,郑永权,郭平毅,宋喜娥..噻呋酰胺在稻田中的残留及消解动态[J].农药学学报,2017,19(1):84-92,9.基金项目
公益性行业 (农业)科研专项 (201503107). （农业）
