College of Science, China Agricultural University, Beijing, 100193, China.
Bull Environ Contam Toxicol. 2012 Jun;88(6):902-5. doi: 10.1007/s00128-012-0610-2. Epub 2012 Apr 17.
The dissipation and residue of myclobutanil in lychee under field conditions were studied. To determine myclobutanil residue in samples, an analytical method with a florisil column clean-up and detected by gas chromatography-electron capture detector (GC-ECD) was developed. Recoveries were found in the range of 83.24 %-89.00 % with relative standard deviations of 2.67 %-9.88 %. This method was successfully applied to analyze the dissipation and residue of myclobutanil in lychee in Guangdong and Guangxi Province, China. The half lives in lychee were from 2.2 to 3.4 days. The residues of myclobutanil in lychee flesh were all below the limit of quantification (LOQ) value (0.01 mg/kg), and most of the residues were concentrated in the peel. The terminal residues of myclobutanil were all bellow the maximum residue limit (MRL) value set by European Union (EU) (0.02 mg/kg). Hence it was safe for the use of this pesticide and the results also could give a reference for MRL setting of myclobutanil in lychee in China.
本研究旨在田间条件下研究抑霉唑在荔枝中的消解和残留情况。为了检测样品中的抑霉唑残留，建立了一种经弗罗里硅土柱净化、气相色谱-电子捕获检测器（GC-ECD）检测的分析方法。该方法的回收率在 83.24%89.00%之间，相对标准偏差为 2.67%9.88%。该方法成功应用于分析中国广东和广西地区荔枝中抑霉唑的消解和残留。抑霉唑在荔枝中的半衰期为 2.2~3.4 天。荔枝果肉中的抑霉唑残留均低于定量限（LOQ）值（0.01mg/kg），大部分残留集中在果皮中。抑霉唑在荔枝中的最终残留均低于欧盟（EU）设定的最大残留限量（MRL）值（0.02mg/kg）。因此，该农药的使用是安全的，研究结果也可为中国设定荔枝中抑霉唑的 MRL 提供参考。
