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[目的]研究褐土中啶虫脒在不同温湿下的室内降解趋势,寻求最佳降解温度和湿度。[方法]土壤中啶虫脒经乙腈高速匀浆提取后,减压浓缩,弗罗里硅土柱净化后GC-ECD进样。[结果]在25℃20%、40%、60%含水量的情况下,啶虫脒的消解符合一级动力学方程,分别为C=3.1921e-0.145t,T1/2=4.8d;C=1.604e-0.231t,T1/2=3.0d;C=3.1329e-0.1564t,T1/2=4.4d。在含水量为40%的情况下,对其20、25、30℃的消解进行了测定,其消解也符合一级动力学方程,分别为C=2.3041e-0.1463t,T1/2=4.7d;C=1.604e-0.231t,T1/2=3.0d;C=0.7029e-0.2314t,T1/2=2.9d。[结论]在30℃、含水量40%的情况下,降解最快。
[Objective] The research aimed to study the indoor degradation trend of acetamiprid in different temperature and humidity in cinnamon soil and seek the best degradation temperature and humidity. [Method] Acetamiprid in soil was extracted by high speed homogenization with acetonitrile and then concentrated under reduced pressure. The GC-ECD sample was purified with Florisil column. [Result] The acetamiprid digestion was in accordance with the first order kinetic equation under the condition of 20%, 40% and 60% water content at 25 ℃, respectively C = 3.1921e-0.145t, T1 / 2 = 4.8d; = 1.604e-0.231t, T1 / 2 = 3.0d; C = 3.1329e-0.1564t, T1 / 2 = 4.4d. When the water content is 40%, the digestion at 20, 25, 30 ℃ is carried out. The digestion is in accordance with the first-order kinetic equation, which is C = 2.3041e-0.1463t and T1 / 2 = 4.7d ; C = 1.604e-0.231t, T1 / 2 = 3.0d; C = 0.7029e-0.2314t, T1 / 2 = 2.9d. [Conclusion] Under the condition of 30 ℃ and water content 40%, the degradation was the fastest.