高效液相色谱法同时检测血浆中阿莫西林和克拉维酸的血药浓度

摘要

目的 建立同时测定血浆中阿莫西林和克拉维酸质量浓度的高效液相色谱法.方法 分析柱为 Phenomenexluna C18柱(250mm×4.6mm,5μm),柱温为室温,流动相为磷酸盐缓冲溶液(pH=3.0)-乙腈(95∶5),流速为1.2mL/min,紫外检测波长为230 nm.结果 克拉维酸和阿莫西林的保留时间分别为5 min和9 min左右,质量浓度线性范围分别为0.13～8.60 μg/mL(r=0.999 4)和0.21～13.20 μg/mL(r=0.999 8),日内和日间精密度的RSD均小于15.0%(n=5).结论 所建立的方法简便、准确,适用于阿莫西林和克拉维酸血药浓度测定.%Objective To establish a HPLC method for the simultaneous determination of amoxicillin and clavulanate in human plasma. Methods The chromatographic separation was carried out on Phenomenex Luna Cm column(250 mm x 4. 6 mm, 5 |xm) with the mobile phase consisting of acetonitrile NatbPCK buffer(pH =3. 0) (95 :5),the flow rate was 1. 2 mL/min. The detecting wavelength was at 230 nm. Results Clavulanate and amoxicillin were eluted for about 5 min and 9 min. Cavulanate and amoxicillin showed the good linear correlation in the range of 0. 13 - 8. 60 |xg/mL (r=0.999 4) and 0. 21 - 13. 20 g/mL( r =0. 999 8) respectively. The intra-day RSD and inter -day RSD were both less than 15. 0% (n = 5). Conclusion The method is simple, accurate and suitable for the determination of plasma drug concentration of amoxicillin and clavulanate.