Whatman glass microfiber filters have a fine capillary
structure and can absorb significantly larger quantities
of water than an equivalent cellulose filter, making them
suitable for spot tests and liquid scintillation counting
methods. The filters can also be made completely
transparent for subsequent microscopic examination.
The particle loading capacity of a filtration system can
be greatly increased by using a prefilter. Whatman glass
microfiber filters such as GF/B or GF/D are ideal because
of the low resistance to fluid flow and high particle loading
capacity. Whatman Multigrade GMF 150 is particularly
valuable for the prefiltration of larger volumes and solutions
that are normally difficult to filter.