Glass Microfiber Filters
Whatman chemically inert binder free glass microfiber filters are manufactured from 100% borosilicate glass.
These depth filters combine fast flow rates with high loading capacity and the retention of very fine particle, extending into the sub-micron range. Glass microfiber filters can be used at temperatures up to 500°C and are ideal for use in applications involving air filtration and for gravimetric analysis of volatile materials where ignition is involved.
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 suited because of the low resistance to fluid flow and high particle loading capacity.
Whatman Grade GF/A Binder Free Glass Microfiber Filters - 1.6μm
Offers fine particle retention and high flow rate, as well as good loading capacity. Used for high-efficiency general purpose laboratory filtration, including water pollution monitoring of effluents, for filtration of water, algae and bacteria cultures.
Whatman Grade GF/B Binder Free Glass Microfiber Filters - 1.0μm
Three times thicker than GF/A with higher wet strength and significantly increased loading capacity. Combines fine particle retention with good flow rate.
Whatman Grade GF/C Binder Free Glass Microfiber Filters - 1.2μm
Combines fine particle retention with good flow rate. The standard filter in many parts of the world for the collection of suspended solids in potable water and natural and industrial wastes.
Whatman Grade GF/D Binder Free Glass Microfiber Filters - 2.7μm
Considerably faster in flow rate and overall filtration speed than cellulose filter papers of similar particle retention. The filter is thick and consequently exhibits a high loading capacity.
Whatman Grade GF/F Binder Free Glass Microfiber Filters - 0.7μm
This high-efficiency filter will retain fine particles down to 0.7 µm. Unlike membrane filters with a comparable retention value, it has a very rapid flow rate and an extremely high loading capacity.