【摘要】 建立了一种快速测定阿奇霉素的荷移分光光度法。阿奇霉素与茜素在乙醇介质中发生电荷转移反应 ,电荷转移络合物在 5 4 6nm处有最大吸收 ,表观摩尔吸光系数为 5 .79× 10 3 L·mol-1·cm-1;该络合物的组成是 1∶1;稳定常数为 4 .8× 10 3 ;药物浓度在 5～ 12 0mg/L范围内服从比耳定律。利用本法测定了阿奇霉素制剂中有效成分的含量 ,并与文献法进行比较 ,二者结果基本吻合。更多还原

【Abstract】 A spectrophotometric method for the determination of azithromycin has been developed based on the charge transfer reaction between azithromycin as donor and alizarin as acceptor in ethanol solution. The composition ratio and stability constant of charge transfer complex are 1∶1 and 4.8×10 3 respectively. The apparent molar absorptivity of complex at 546 nm is 5.79×10 3 L·mol -1 ·cm -1 . Beer′s law is obeyed in the range of 5～120 mg/L azithromycin. The relative standard deviation of six determinations is 1.4%. The proposed method has been applied to the determination of azithromycin in preparation with satisfactory results.更多还原