摘要
建立了茶叶和土壤中啶虫脒的气相色谱残留检测方法，啶虫脒最低检出量为0．02ng，最低检出浓度为0．01mg／kg。在0．01-1．0mg／kg添加水平范围内，啶虫脒在茶叶中的平均添加回收率为78．9％～103．8％，相对标准偏差1．37％～3．92％；在土壤中的平均添加回收率为81．8％-91．4％，相对标准偏差2．58％～6．83％。采用田间实验方法研究了啶虫脒的降解动态规律，啶虫脒在湖南、浙江、四川3地的茶叶和土壤中的消解半衰期分别为3．36～8．77d和1．23～16．5d，属于极低残留农药。
A method for the determination of acetamiprid residues in tea and soil Detection limit of acetamiprid was 0.02 ng and its concentration limit was 0.01 by GC-ECD was developed. mg/kg in tea or in soil. The average recovery of acetamiprid from tea spiked at the level from 0.01 to 1 mg/kg varied from 78.9% to 103.8%.Similarly, average recovery from soil fortified at 0.01 to 1 mg/kg varied from 81.8% to 91.4%. The relative standard deviation was 1.37%-3.92% and 2.58%-6.83%, respectively. The degradation dynamics of acetamiprid was studied under field conditions. The half lives varied from 3.36 d to 8.77 d in tea and 1.23 d to 16.5 d in soil from field experiments conducted in three provinces, which revealed that acetamiprid is an easily degradable pesticide.
出处
《精细化工中间体》
CAS
2014年第1期67-72,共6页
Fine Chemical Intermediates
关键词
啶虫脒
茶叶
土壤
残留
降解动态
acetamiprid
tea
soil
residue
degradation dynamic
