金币
UID265491
帖子
主题
积分13311
注册时间2016-8-2
最后登录1970-1-1
听众
性别保密
|
发表于 2018-2-3 16:01:58
|
显示全部楼层
0.45和0.22u滤膜都符合药典要求。溶液粘度大的可用0.45u的。
中国药典2015版
1. 薄膜过滤法
薄膜过滤法一般应采用封闭式薄膜过滤器。无菌检査用的滤膜孔径应不大于0.45pm,直径约为50mm。根据供试品及其溶剂的特性选择滤膜材质。使用时,应保证滤膜在过滤前后的完整性。
USP 28 版
Membrane Filtration
Use membrane filters having a nominal pore size not greater than 0.45 µm whose effectiveness to retain microorganisms has been established. Cellulose nitrate filters, for example, are used for aqueous, oily, and weakly alcoholic solutions; and cellulose acetate filters, for example, are used for strongly alcoholic solutions. Specially adapted filters may be needed for certain products (e.g., for antibiotics).
The technique described below assumes that membranes about 50 mm in diameter will be used. |
|