采用高效液相色谱,以C18为固定相,以V(甲醇)∶V(水)=50∶50(用磷酸调pH=3)为流动相,检测波长220 nm及氢火焰离子化检测器气相色谱相结合的方法,对33.5%甲磺.异丙.莠悬浮剂进行定量分析。结果表明,甲基磺草酮、异丙草胺、莠去津线性相关系数分别为0.9993,0.999 1,0.999 6;变异系数分别为0.62%,0.34%,0.51%;平均回收率分别为99.4%,99.7%,99.7%。该方法简便、快捷,准确。 Using high performance liquid chromatography with C18 as the stationary phase and V (methanol): V (water) = 50:50 (adjusted to pH = 3 with phosphoric acid) as the mobile phase, the detection wavelength was 220 nm and the hydrogen gas flame ionization detector gas phase Chromatography, the 33.5% mesylate isopropylalkyloxacin was quantitatively analyzed. The results showed that the linear correlation coefficients of mesotrione, isopropamide and atrazine were 0.9993, 0.999 and 1 .09999, respectively. The coefficients of variation were 0.62%, 0.34% and 0.51%, respectively. The average recoveries were 99.4% , 99.7%, 99.7%. The method is simple, fast and accurate.