Whatman* 25 mm GD/X Syringe Filters

Whatman 25 mm GD/X syringe filters are designed to facilitate manual filtration of hard-to-filter samples greater than 10 ml. These syringe filters contain a unique prefiltration stack of Whatman Multigrade GMF 150 (10:1 µm) and Grade GF/F (0.7 µm) prefilters. Multigrade GMF 150 is a combination of two glass microfiber filters in one. Manufactured from 100% borosilicate glass, it is constructed of a coarse layer on top, meshed with a fine layer below. The Grade GF/F filter will retain fine particles down to 0.7 µm. These prefilters, combined with the available retentate space within the device, allow you to filter even the most difficult samples with less hand force than ever before possible. Compared to the capacity of an unprotected membrane, the volume of sample filtered can be three to seven times greater.