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[方法]采用田间试验方法研究氟环唑在香蕉和土壤中的残留与降解情况。气相色谱氮磷检测器进行定量分析。[结果]研究结果表明:氟环唑的降解符合一级动力学方程,在香蕉和土壤中半衰期分别为7.2~9.9、8.0~10.0 d。按施药剂量为150 mg a.i./kg,施药3次,距最后1次施药间隔42 d计算,测得香蕉和土壤中氟环唑残留量为0.01~0.09 mg/kg。[结论]测得的残留量低于美国规定的MRL值(0.5 mg/kg),不会对香蕉和土壤造成残留污染。
[Method] The field experiment was used to study the residues and degradation of epoxiconazole in banana and soil. Gas chromatographic nitrogen and phosphorus detector for quantitative analysis. [Result] The results showed that the degradation of epoxiconazole conformed to the first-order kinetic equation, and the half-lives in banana and soil were 7.2-9.9 and 8.0-10.0 d respectively. The residues of epoxiconazole in banana and soil were determined to be 0.01-0.09 mg / kg according to the dose of 150 mg a.i./kg applied three times and 42 days after the last application. [Conclusion] The measured residual amount was lower than the MRL value (0.5 mg / kg) prescribed by the United States, and would not cause residual pollution to banana and soil.