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本文用HPLC柱切换技术,以MercklichroprepRP2(25~40μm)为预处理柱填料,ShimpackCLC-ODS为分析柱,水为预处理流动相,0.2mol/L乙酸和乙酸铵为净化清洗液,在线净化富集样品;通过柱自动切换,以甲醇-乙酸铵(0.2mol/L,pH2.7)(32∶65)为分析流动相,将净化富集于预处理柱上的被测组分冲至分析柱上分离,在280nm处测定。本法操作简单,血浆中环丙氟哌酸含量以外标法定量,日间相对标准偏差为0.7~2.2%,日内相对标准偏差为1.1~3.3%,在浓度为103~5150ng/ml范围内线性良好,r=0.9999,最低检测浓度达52ng/Ml血浆。
In this paper, HPLC column switching technology, MercklichroprepRP2 (25 ~ 40μm) as pretreatment column packing, ShimpackCLC-ODS as analytical column, water as pretreatment mobile phase, 0.2mol / L acetic acid and ammonium acetate as cleaning liquid, The samples were concentrated and the mobile phase was eluted with methanol-ammonium acetate (0.2mol / L, pH2.7) (32:65) To the analytical column separation, measured at 280nm. The method is simple to operate. The content of ciprofloxacin in plasma was determined by external standard method. The relative standard deviations were 0.7-2.2% in daytime, and the relative standard deviations were 1.1-3.3% in the day. At the concentration of 103 ~ 5150ng / ml within the range of good, r = 0.9999, the lowest detection concentration of 52ng / Ml plasma.