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许多中草药有效成分经分离或合成代用品后，其溶解度小，而且溶剂的稳定性差。通常采用加入某些表面活性物质（如吐温类）来增强有效成分的溶解度和提高药液的澄明度。但吐温类在不同中药注射液中用量不同，一般在０．０２％～２％。实际工艺过程中常以经验或目测加以确定。由
Many of the active ingredients of Chinese herbal medicines have low solubility and poor solvent stability after they have been separated or replaced by synthetic substitutes. The addition of certain surface-active substances such as Tween is usually used to enhance the solubility of the active ingredient and to increase the clarity of the liquid. However, the amount of Tween in different traditional Chinese medicine injections is different, generally 0.02% to 2%. The actual process is often determined empirically or visually. by