【摘要】 利用高效液相色谱法（HPLC）同时测定复方磺胺间甲氧嘧啶钠注射液中磺胺间甲氧嘧啶钠和甲氧苄啶的含量。采用C₁₈柱（5μm, 4.6 mm×250.0 mm）,以乙腈∶0.1%磷酸溶液（20∶80,V/V）为流动相，检测波长230 nm,柱温30℃,流速1.0 mL/min。结果表明，磺胺间甲氧嘧啶在5.00～200.00μg/mL浓度范围内与峰面积线性关系良好（R²=0.999 6）,平均回收率为99.49%,RSD为0.18%;甲氧苄啶在1.00～50.00μg/mL浓度范围内与峰面积线性关系良好（R²=0.999 7）,平均回收率为99.02%,RSD为0.60%。本方法简单快捷，精密度好，可用于控制复方磺胺间甲氧嘧啶钠注射液中磺胺间甲氧嘧啶钠和甲氧苄啶的含量。更多还原

【Abstract】 The content sulfamethoxine sodium and trimethoprim in Compound Sulfamethoxine Sodium injection was determined by HPLC. Using C₁₈ column（4.6 mm×250.0 mm, 5 μm） at 30℃, acetonitrile-0.1% phosphoric acid（20∶80, V∶V） was used as mobile phase, the detection wavelength was 230 nm, the flow rate was 1.0 mL·min^-1. The results showed that sulfamethoxine had a good linear relationship with peak area in the range of 5.00-200.00 μg·mL^-1（R²=0.999 6）, the average recovery was 99.49% and RSD was 0.18%; trimethoprim had a good linear relationship with peak area in the range of 1.00-50.00 μg·mL^-1（R²=0.999 7）, the average recovery was 99.02% and RSD was 0.60%. The method is simple, rapid, accurate and can be used to control the contents of sulfamethoxine sodium and trimethoprim in Compound Sulfamethoxine Sodium injection.更多还原