(一)金霉素的溶解性质及其安定度一般用的金霉素为金霉素監酸監,係淡黄色结晶性粉末,1克能溶於水75毫升,水溶液呈酸性。監酸監的溶液pH在2.5—4.5之间,比较安定;钠監溶液pH8.5,不安定。在碳酸監的缓种溶液内50分钟后,钠監失去12%的效力。硼酸監的溶液呈中性(pH7.5—7.8),在室温中0.5%溶液可保持48小时不至失 (A) of the dissolution of chlortetracycline and its stability Acycline commonly used chlortetracycline chlortetracycline supervisor, Department of pale yellow crystalline powder, 1 g can dissolve in water 75 ml, the aqueous solution was acidic. Acid supervisor monitoring solution pH between 2.5-4.5, more stable; sodium monitoring solution pH8.5, restless. After 50 minutes in carbonate buffer solution, sodium supernatant to 12% effectiveness. Boric acid supernatant solution was neutral (pH7.5-7.8), at room temperature 0.5% solution can be maintained for 48 hours without loss