摘要
目的:建立以高效液相色谱法测定人血浆中莫西沙星浓度的方法。方法:以Kromasil C_8柱为固定相,0.05mol·L^(-1)磷酸二氢钾缓冲液:甲醇:乙腈(65:15:20)为流动相,调节pH至3.0,流速1 ml·min^(-1),柱温30℃,紫外检测波长296nm,进样量20μl。沉淀剂选用8%高氯酸溶液,以峰面积外标法定量。结果:莫西沙星保留时间为6.2min,线性范围0.08~4.80mg·L^(-1),最低定量限为0.08mg·L^(-1);方法平均回收率为95.20%~100.85%,绝对回收率为79.98%~91.83%;高、中、低系列浓度日内RSD为4.69%~5.23%,日间RSD为6.08%~7.36%;样品在低温冷冻条件下至少可稳定保存28d。结论:本法简便、快速,灵敏度高,重复性好,适用于临床血药浓度测定及药动学研究。
Objective: To establish an HPLC method for determination of moxifloxacin concentration in human plasma and to study its pharmacokinetics. Method: The separation was performed on a Kromasil C8 column with mobile phase consisted of 65% 0.05mol. L^-1 potassiun dihydrogen phosphorate buffer solution (containing 1% triethylamine, pH adjusted to 3.0), 15% methanol and 20% acetonitrile. The flow rate was 1.0 ml.min^-1 and the detection wavelength was at 296 nm. The column temperature was 30℃ and injection volume was 20ul. 8% perchloric acid was chosen as precipitator. External standard method was used. Result: The retention time of moxifloxacin was about 6.2 min. The calibration curve was linear within the concentration range of 0.08 - 4.80 mg·L^-1. The limit of quantitation (LOQ) was 0.08 mg·L^-1. The recovery of methodology was 95.20% - 100.85% ; and the absolute recovery was 79.98% - 91.83%. RSD for within day precision and between day precision were 4.69% - 5.23% and 6.08% - 7.36% %, respectively. The sample under frozen condition was stable at least within 28 days. Conclusion: The established HPLC method is simple, sensitive and accurate. It could be used for the determination of moxiflocacin concentration in plasma and its pharmacokinetics study.
出处
《中国药师》
CAS
2009年第11期1537-1539,共3页
China Pharmacist
基金
深圳市科技计划(医疗卫生类)项目(项目编号:200703224)