Objective] To establish an analysis method for the high performance liquid chromatography (HPLC) of isoxaflutole TC.[Method] High performance liquid chromatography was adopted.With acetonitrile : acetic acid (55∶45, V/V) as the mobile phase, C18 chromatographic column and SPD-M20A PDA detector were used to analyze the content of isoxaflutole.[ Result] Under the chromatographic analysis conditions, the standard deviation of isoxaflutole was 0.008, the variation coefficient was 0.09%, and the recovery rate was 104%.[Conclusion] This meth-od is suitable for the qualitative and quantitative analysis of isoxaflutole TC.%[目的]建立异噁唑草酮原药的高效液相色谱分析方法。[方法]采用高效液相色谱法，以乙腈－乙酸（55∶45，V／V）为流动相，应用C18色谱柱和SPD－M20A PDA检测器分析异噁唑草酮的含量。[结果]该色谱分析条件下异噁唑草酮的标准偏差为0．008，变异系数为0．09％，回收率为104％。[结论]该方法适用于定性、定量分析异噁唑草酮原药。
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