standard grade ghp syringe filter effective filtration area 3.9 cm2
Cleanroom Standards
(b) The guidance given for the maximum permitted number of particles in the “at rest” condition corresponds approximately to the US Federal Standard 209E and the ISO classifications as follows: grades A and B correspond with class 100, M 3.5, ISO 5; grade C with class 10 000, M 5.5, ISO 7 and grade D with class 100 000, M 6.5, ISO 8.
Ion exchange membranes for water purification
from standard grades to special grades. Storage and handling. For optimal performa...