为了进一步加强对盐酸多西环素片的质量控制，1990年版中国药典就开始增加了溶出度的检测项目。在进行溶出度的检验方法中，药典规定样品和标准品最后均用水稀释成含20ug的溶液后，照分光光度法，在276nm的波长处分别测定吸收度，按两者吸收度的比值计算每片的溶出量。将019的 In order to further strengthen the quality control of doxycycline hyclate tablets, the 1990 edition of Chinese Pharmacopoeia began to increase the dissolution of the test items. In the dissolution test method, the Pharmacopoeia samples and standards were diluted with water containing 20ug of the final solution, according to spectrophotometry, were measured at a wavelength of 276nm absorbance, according to the ratio of the two absorbance per Dissolution of tablets. Will be 019’s