College of Science, China Agricultural University, Beijing, 100193, People's Republic of China.
Environ Monit Assess. 2012 Jul;184(7):4247-51. doi: 10.1007/s10661-011-2259-4. Epub 2011 Aug 4.
A simple analytical method was developed to determine the 2,4-D isooctyl ester residue in wheat and soil by gas chromatography coupled with electron capture detector. Using the method, the dissipation and residue of 2,4-D isooctyl ester in wheat field was investigated. The average recoveries of 2,4-D isooctyl ester ranged from 80.1% to 110.0% with relative standard deviations of 2.4% to 16.1%. The pesticide showed a rapid dissipation rate either in wheat seedling or soil, with the half-lives of 1.0 to 3.0 days. The terminal residue results in wheat grain were much lower than the codex MRL (2.0 mg/kg). It could be considered safe to food and environment when using this herbicide for controlling weeds in wheat field.
建立了一种用气相色谱-电子捕获检测器测定小麦和土壤中 2,4-D 异辛酯残留量的分析方法。应用该方法研究了 2,4-D 异辛酯在麦田中的消解和残留动态。2,4-D 异辛酯在小麦植株和土壤中的平均回收率为 80.1%110.0%，相对标准偏差为 2.4%16.1%。该农药在小麦幼苗或土壤中的消解速度较快，半衰期为 1.0~3.0 天。小麦籽粒中的最终残留量远低于法典 MRL（2.0mg/kg）。因此，在麦田中使用该除草剂防除杂草时，对食品和环境是安全的。
