高效液相色谱法同时测定复方甲硝唑散中甲硝唑、盐酸丁卡因及醋酸地塞米松的含量

目的:建立以高效液相色谱法同时测定复方甲硝唑散中甲硝唑、盐酸丁卡因及醋酸地塞米松含量的方法。方法:色谱柱为C18,流动相为甲醇-水-三乙胺(65∶35∶0.36),检测波长甲硝唑、盐酸丁卡因为310nm,醋酸地塞米松为240nm,流速为1ml/min,柱温为25℃。结果:甲硝唑、盐酸丁卡因、醋酸地塞米松进样量分别在0.412μg~2.06μg(r=0.9999)、0.191μg~0.956μg(r=0.9999)、0.121μg~0.604μg(r=0.9998)范围内线性关系良好;平均回收率分别为100.69%(RSD=1.28%)、101.37%(RSD=0.23%)、102.40%(RSD=0.89%)。结论:本方法简便、准确,重现性好,可用于复方甲硝唑散的质量控制。

Simultaneous Content Determination of Metronidazole, Tetracaine Hydrochloride and Dexamethasone Acetate in Metronidazole Compound Powder by HPLC

OBJECTIVE:To establish HPLC method for the simultaneous content determination of metronidazole,tetra-caine hydrochloride and dexamethasone acetate in metronidazole compound.METHODS:The content determination was per-formed on column C 18 ;the mobile phase consisted methanol-water-triethylamine(65∶35∶0.36),the detection wavelength of both metronidazole and tetracaine hydrochloride was310nm,and240nm for dexamethasone acetate,the flow rate was1ml/min and the column temperature was25℃.RESULTS:The linear ranges of metronidazole,tetracaine hydrochloride and dexameth_ asone acetate were0.412μg～2.06μg(r=0.9999),0.191μg～0.956μg(r=0.9999)and0.121μg～0.604μg(r=0.9998),respectively,and their average recoveries were100.69%(RSD=1.28%),101.37%(RSD=0.23%)and102.40%(RSD=0.89%),respectively.CONCLUSION:The method was simple,accurate,reproducible,and suitable for the quality control of metronidazole compound.