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采用高效液相色谱法分析普力克水剂，在反相Extend－C18柱上，用甲醇：水：氨水为80:19.4:0.6（体积比）作流动相，用紫外-可见检测器在波长210nm处检测。方法的标准偏差 0．1673，变异系数0．23% ，回收率 98.6% －100.6% ，线性相关系数0．9957。
The levofloxacin was analyzed by high performance liquid chromatography. On the reversed-phase Extend-C18 column, the mobile phase was methanol: water: ammonia at 80:19:4:60 (volume ratio) Department of testing. The standard deviation of the method was 0.1673, the coefficient of variation was 0.23%, the recovery was 98.6% -100.6% and the linear correlation coefficient was 0.9957.