A spectrophotometric method based on the charge-transfer reaction between azithromycin and alizarin redin aqueous ethanolic solution was established for the determination of azithromycin tablets.

• 阿奇霉素与茜素红在乙醇-水溶液中发生荷移反应,由此建立了荷移分光光度法测定阿奇霉素片的含量。