采用高效液相色谱法,以甲醇-乙腈-水(体积比为50:40:10,加入0.01%三乙胺)为流动相,使用C18反相柱和紫外可变波长检测器(波长245 nm),用外标法对15%甲维.吡虫啉悬浮剂进行了定量分析。结果表明,方法中甲维盐和吡虫啉标准偏差分别为0.04,0.05,变异系数分别为0.77%,0.49%,平均回收率分别为99.07%,100.04%。 High performance liquid chromatography with methanol-acetonitrile-water (50:40:10 by volume with 0.01% triethylamine) as mobile phase was performed on a C18 reversed-phase column with a UV-vis detector at a wavelength of 245 nm ), The external standard method was used for quantitative analysis of imidacloprid suspension 15%. The results showed that the standard deviations of the metformin and imidacloprid were 0.04,0.05 and 0.77%, 0.49%, respectively. The average recoveries were 99.07% and 100.04%, respectively.