| 摘要 |
<p>A filter for use in a process for the filtration of liquor cerbrospinalis comprises a membrane filter layer having a pore size of from 0.04 to 0.45 νm and a thickness of from 0.1 to 1 mm, wherein said filter has a geometric surface area of from 15 to 300 cm2 and a pyrogen separation capacity of at least 500 νg.</p> |
