浙江农业学报

• 植物保护 • 上一篇    下一篇

噻虫胺在水稻中的残留分析方法及其消解动态

  

  1. (省部共建国家重点实验室培育基地,浙江省植物有害生物防控重点实验室,农业部农药残留检测重点实验室,浙江省农业科学院 农产品质量标准研究所,浙江 杭州 310021)
  • 出版日期:2014-09-25 发布日期:2014-10-11

Determination method of clothianidin residue and its degradation dynamics in rice

  1. (State Key Lab Breeding Base for Zhejiang Sustainable Plant Pest Control, MOA Key Lab for Pesticide Residue Detection, Institute of Quality and Standard for Agro\|products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China)
  • Online:2014-09-25 Published:2014-10-11

摘要: 为了评价噻虫胺在水稻上的残留动态和环境安全性,于2012年分别在浙江、山东和湖南进行了噻虫胺残留动态试验,建立了噻虫胺残留的高效液相色谱—串联质谱(UPLC\|MS/MS)分析方法。该方法对噻虫胺的检出限为001 mg·kg-1。添加浓度为001~10 mg·kg-1时,平均回收率为85%~106%;相对标准偏差(RSD)为18%~100%。该方法的灵敏度、精密度和回收率等均符合农药残留分析的要求。田间试验结果表明,噻虫胺在水稻植株和稻田中的消解动态符合一级动力学方程,消解半衰期分别为(25~44),(27~89)d,表明噻虫胺属易降解农药。

关键词: 噻虫胺, 水稻, UPLC\, MS/MS, 残留

Abstract: In order to study the residual dynamics and environmental safety of clothianidin in rice eco\|system, the field trials on the dissipation of clothianidin 48% SC were carried out in Zhejiang, Shandong and Hunan Provinces in 2012. The determination method of clothianidin residues in rice was established by ultra performance liquid chromatography\|tandem mass spectrometry (UPLC\|MS/MS). The limit of quantitation (LOQ) of the established determination method for clothianidin residue was 001 mg·kg-1. The average recovery rate of clothianidin was around 85%-106% with 001 to 10 mg·kg-1 spiking, and the relative standard deviations was 18%-100%. Therefore, the established method was suitable for the determination of clothianidin residues in rice. The field experiments demonstrated that the degradation of clothianidin in rice and paddy fields were conformed to the first\|order dynamic equation. The half\|lives of clothianidin in rice and paddy fields were 25-44 d and 27-89 d, respectively, which indicated that clothianidin was easily degradable in the rice eco\|system.

Key words: clothianidin, rice, UPLC\, MS/MS, residues