All Whatman Glass Microfibre filters have a fast filtration and a high loading capacity and particle retention rate.
u Manufactured without chemical binder from high grade borosilicate glass
u They are suitable for gravity or low suction filtration
u Filtration speeds generally very much higher than conventional cellulose papers
u Efficient retention of micron size particles
u Must be used flat. Ideal for use in flat perforated plate Buchner type funnels (not sintered glass models)
u Can be used up to 550°C
u Wide range of applications including: — retention of fine analytical precipitates
— retention of biochemical gelatinous precipitates
— water/air pollution analyses — as prefilters for membranes — scintillation counting — radioimmunoassay
Grades
GF/A The general purpose high efficiency glass micro-fibre filter. Particle retention to 1.6µm.
GF/B Three times thicker and with greater wet strength than GF/A. Particle retention to 1µm.
GF/C Extremely efficient filter made to retain fine particles and micro-organisms. Particle retention to 1.2µm.
GF/D Thick filter made from less fine fibres and retaining 2.7µm size particles with a very high loading capacity. Extremely high speed.
GF/F This ultra-fine filter has a 98% retention efficiency for particles down to 0.7µm in liquids.
934-AH High retention at high flow rates. Widely used in water pollution monitoring techniques for suspended solids, and is specified in US Method 934-AH. Particle retention to 1.5µm.
EPM2000 Specially manufactured for use in air samplers with a high throughput of air.
QM-A Quartz Manufactured from quartz microfibre to withstand high temperatures.
All grades supplied in boxes of circles or sheets as indicated.
