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[摘要]
目的 建立HPLC对注射用头孢孟多酯钠中有关物质进行测定的方法。方法 菲罗门Luna C18(2)色谱柱(250 mm×4.6 mm,5μm),流动相为1%三乙胺溶液(用磷酸调节pH值至2.5)-乙腈(76:24),体积流量为1.5 mL/min,检测波长为254 nm,柱温为40℃,进样量为20μL。采用杂质对照品法外标法计算杂质D,采用加校正因子的主成分自身对照法计算杂质A、E、C。结果 杂质D为主要降解产物,定量限为0.01%,在0.02~0.20μg与峰面积线性关系良好。杂质A、E、C的校正因子分别为1.14、1.25、1.14,检测限分别为0.004%、0.02%、0.04%。结论 杂质D、A、E、C作为特定杂质应订入质量标准,可以更好地控制注射用头孢孟多酯钠中有关物质。
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[Abstract]
Objective To establish an HPLC method for determination of related substances in Cefamandole Nafate for injection. Methods HPLC method was adopted. The determination was performed on Phenomenex C18 (2) column (250 mm×4.6 mm, 5 μm), mobile phase was 1% triethylamine solution (phosphoric acid adjusted pH to 2.5)-acetonitrile (76:24) at a flow rate of 1.5 mL/min. The detection wavelength was set at 254 nm, the column temperature was at 40℃, and the injection volume was 20 μL. Impurity D was determined by external standard method, and impurity A, E, and C were determined by principal component self control method with correction factor. Results Impurity D was the main degradation products, the quantitative limits was 0.01%, and there had good linearity in the ranges of 0.02-0.20 μg/mL. The correction factors of impurity A, E and C were 1.14, 1.25, and 1.14, respectively, and the detection limits were 0.004%, 0.02%, and 0.04%, respectively. Conclusion Impurity D, A, E, and C should be adopted into the quality standard as specific impurities which can better control the related substances in Cefamandole Nafate for injection.
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