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    王世英, 黄日林, 李梓豪, 黄聪灵, 毛润乾, 张志祥. 联苯菊酯在甘蓝及土壤中的消解动态[J]. 华南农业大学学报, 2016, 37(3): 82-85. DOI: 10.7671/j.issn.1001-411X.2016.03.012
    引用本文: 王世英, 黄日林, 李梓豪, 黄聪灵, 毛润乾, 张志祥. 联苯菊酯在甘蓝及土壤中的消解动态[J]. 华南农业大学学报, 2016, 37(3): 82-85. DOI: 10.7671/j.issn.1001-411X.2016.03.012
    shu
    WANG Shiying, HUANG Rilin, LI Zihao, HUANG Congling, MAO Runqian, ZHANG Zhixiang. Degradation dynamics of bifenthrin in cabbage and soil[J]. Journal of South China Agricultural University, 2016, 37(3): 82-85. DOI: 10.7671/j.issn.1001-411X.2016.03.012
    Citation: WANG Shiying, HUANG Rilin, LI Zihao, HUANG Congling, MAO Runqian, ZHANG Zhixiang. Degradation dynamics of bifenthrin in cabbage and soil[J]. Journal of South China Agricultural University, 2016, 37(3): 82-85. DOI: 10.7671/j.issn.1001-411X.2016.03.012
    shu

    联苯菊酯在甘蓝及土壤中的消解动态

    Degradation dynamics of bifenthrin in cabbage and soil

      摘要
    • 摘要:
      目的 建立残留联苯菊酯的检测方法，研究质量分数1%联苯菊酯·噻虫咹颗粒剂中联苯菊酯在甘蓝Brassica oleracea和土壤中的残留及消解动态。
      方法 在广东广州市、广西南宁市和湖北潜江市进行田间试验，联苯菊酯在0.01~1.00 mg·kg-1水平范围内取0.01、0.10、0.50 mg·kg-1添加，样品中的联苯菊酯经乙腈超声波辅助提取，弗罗里硅土固相萃取柱净化，气相色谱(GC-ECD)检测，外标法定量，得到联苯菊酯在甘蓝和土壤中的残留及消解动态。
      结果 联苯菊酯在甘蓝中的平均回收率为83.64%~96.44%，相对标准偏差为3.26%~7.24%;在土壤中平均回收率为86.76%~90.09%，相对标准偏差为2.17%~4.94%。联苯菊酯在土壤中的残留半衰期为6.77~13.51 d，在甘蓝中未检出。
      结论 联苯菊酯属易降解农药；该施药方法安全，值得借鉴。

       

      Abstract:
      Objective To establish a detection method of bifenthrin, and to study the residue and degradation dynamics of bifenthrin in the form of 1% bifenthrin·clothianidin granules in cabbage and soil.
      Method Field experiments were conducted in Guangzhou of Guangdong, Nanning of Guangxi and Qianjiang of Hubei.Bifenthrin was added at three levels of 0.01, 0.10, 0.50 mg·kg-1 in the range from 0.01 to 1.00 mg·kg-1. Bifenthrin was extracted from cabbage and soil using ultrasonic-assisted acetonitrile extraction, cleaned up using a florisil solid phase extraction column, then detected by GC with ECD detector, and quantified by external standard method.
      Result The average recovery rates of bifenthrin in cabbage were 83.64 %-96.44% with 3.26%-7.24%RSD, and the average recovery rates in soil were 86.76%-90.09% with 2.17%-4.94%RSD. The half-life of bifenthrin in soil was 6.77-13.51 d.No bifenthrin residue was detected in cabbage at harvest.
      Conclusion Bifenthrin is an easily degradable pesticide. Using 1% bifenthrin·clothianidin granules as pesticide is safe and recommended.

       

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