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当前位置: 首页 > 文章 > 绿豆和向日葵中福美双的残留分析 农药 2017 (7) 518-520+523
Position: Home > Articles > Analysis of Thiram Residues in Mung Bean and Sunflower Agrochemicals 2017 (7) 518-520+523

绿豆和向日葵中福美双的残留分析

作  者：
王德飘;田春亚;蒙邦花;孟信刚;吴玉娥;卢平;薛伟;胡德禹
单  位：
贵州大学绿色农药与农业生物工程国家重点实验室培育基地教育部绿色农药与生物工程重点实验室精细化工研究开发中心
关键词：
福美双;绿豆;向日葵;气相色谱;残留量;田间应用
摘  要：
[目的]建立气相色谱-电子捕获检测器(GC-ECD)检测绿豆和向日葵中福美双残留量的方法,为18%辛硫磷·福美双微囊悬浮剂在绿豆和向日葵上的田间应用提供科学用药参考。[方法]实验研究根据GB 2763—2014规定,将福美双衍生化为CS_2。样品在SnCl_2·HCl溶液中加热到85℃分解产生CS_2,正己烷吸收CS_2,GC-ECD检测,仪器的最小检出量(LOD)为2.52×10~(-11)g,最低检测质量分数(LOQ)为0.08 mg/kg。[结果]绿豆和向日葵中的福美双添加质量分数为0.13、0.67、5.33 mg/kg时,福美双在绿豆中的平均回收率为86.24%~101.72%,相对标准偏差为0.99%~5.10%,在向日葵中平均回收率为83.64%~100.52%,相对标准偏差为1.00%~5.60%。田间试验研究结果显示,福美双在绿豆和向日葵中的最终残留量(福美双转化为CS_2,以CS_2计)均低于0.08 mg/kg。[结论]绿豆按18%辛硫磷·福美双微囊悬浮剂推荐剂量1∶(80~53)(药种比)的制剂用量施用,向日葵按推荐剂量1∶(17~25)(药种比)的制剂用量施用,收获的成熟绿豆和向日葵是安全的。
译  名：
Analysis of Thiram Residues in Mung Bean and Sunflower
作  者：
WANG De-piao;TIAN Chun-ya;MENG Bang-hua;MENG Xin-gang;WU Yu-e;LU Ping;XUE Wei;HU De-yu;Guizhou University, State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering,Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education;
关键词：
thiram;;mung bean;;sunflower;;gas chromatography;;residue;;field application
摘  要：
[Aims] A gas chromatography-electron capture detector(GC-ECD) method for determination of thiram residues in mung bean and sunflower was developed to provide a reference for the rational use of phoxim·thiram 18%microcapsule suspension in the field. [Methods] According to the national standard GB 2763—2014, thiram was derivatized to carbon disulfide, then carbon disulfide was extracted with n-hexane and determined by gas chromatography-electron capture detector. The limits of detection(LOD) were 2.52 ×10~(-11) g, and the limits of quantitation(LOQ) were 0.08 mg/kg. [Results] When the spiked levels were 0.13, 0.67 and 5.33 mg/kg, the recoveries of thiram in mung bean were 86.24-101.72% with the relative standard deviations of 0.99-5.10%; the recoveries of thiram in sunflower were 83.64-100.52% with the relative standard deviations of 1.00-5.60%. The final residues of thiram in mung bean and sunflower were less than 0.08 mg/kg(measured as CS_2). [Conclusions] Mung bean and sunflower were treated with phoxim·thiram 18% microcapsule suspension at the recommended dose of 1∶(80-53) and1∶(17-25)(mass ratio), respectively. The final residues of thiram in mung bean and sunflower were safely at harvest.

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