All Whatman Glass Microfibre filters have a fast filtration and a high loading capacity and particle retention rate.

Grade 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.

• Manufactured without chemical binder from high grade borosilicate glass
• They are suitable for gravity or low suction filtration
• Filtration speeds generally very much higher than conventional cellulose papers
• Efficient retention of micron size particles
• Must be used flat. Ideal for use in flat perforated plate Buchner type funnels (not sintered glass models)
• Can be used up to 550°C
• 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