复方克林霉素凝胶微生物限度检查法的方法验证研究

目的:建立复方克林霉素凝胶微生物限度检查法,并进行方法验证。方法:根据《中国药典》2005年版二部附录微生物限度的检查方法即常规法、培养基稀释法和薄膜过滤法,对复方克林霉素凝胶进行方法验证,通过比较回收率来确定适宜的检查方法。结果:采用常规法试验,样品对试验菌回收率均低于70%,且不能检出控制菌。采用培养基稀释法试验,样品对试验菌回收率虽大于70%,但低于稀释剂回收率。采用薄膜过滤法试验,各试验菌回收率均大于90%,且控制菌生长良好,可基本消除复方克林霉素凝胶的抑菌作用。结论:采用薄膜过滤法检查复方克林霉素凝胶微生物限度方法有效、可行。

Validation of Microbial Limit Test for Compound Clindamycin Hydrochloride Gel

OBJECTIVE：To establish microbial limit test for Compound clindamycin hydrochloride gel and to carry out the validation of three methods.METHODS：According to the appendices volumeⅡof Chinese Pharmacopeia（edition 2005）,microbial limit test which contained routine test,medium dilution method and membrane-filter method was adopted to validate Compound clindamycin hydrochloride gel.Recoveries of three methods were compared to make sure the suitable validation method.RESULTS：In routine test,recovery of trial bacteria was lower than 70%and controlled bacteria couldn＇t be found out.In medium di-lution method,recovery of trial bacteria was higher than 70%and still lower than the recovery of diluents.In membrane-filter method,recovery of trial bacteria was higher than 90%,and controlled bacteria grew well.Membrane-filter method could eliminate inhibition effect of Compound clindamycin hydrochloride gel on bacteria.CONCLUSION：Membrane-filter method is effective and practical for microbial limit test of Compound clindamycin hydrochloride gel.