VWR® Glass Fiber Filters

Binder-free VWR® glass fiber filters feature fast flow rates, high-loading capacity, wide thermal tolerance, and excellent precipitate retention. Available in three grades: Grade 691 is an ideal filter for radioimmunoassay of weak beta emitters by scintillation counting, and for filtration of precipitated proteins, cells, and cell debris. Also used for gravimetric determination of airborne particulates. Grade 693 is recommended for use in dissolved and suspended solids testing in sanitary water analysis procedures. Grade 696 is used for monitoring specific pollutants (e.g., Hg in water), and in marine chemistry to filter particulate components in seawater. Also used in RIA procedures and for harvesting lymphocytes during incorporation trials. 

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Grade GF/A Glass Microfiber Filters, Whatman®

Used in biochemistry for the filtration of precipitated proteins, cells, and cell debris. An ideal filter for radio-immunoassay of weak beta emitters by scintillation counting. A standard for gravimetric determination of airborne particulates. Binder-free.

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Grade 934-AH™ Glass Microfiber Filters, Whatman®

Binder-free, high-purity borosilicate glass microfiber filters are used in the determination of total suspended solids, removal of turbidity, and filtration of bacterial cultures as well as in a wide range of water monitoring applications. High loading capacity allows processing of very turbid samples. Provide superior fine particle retention (1.5μm) at high flow rates. Withstand temperatures up to 550°C (1022°F). 

Ordering Information: For grade 934-AH glass microfiber filters in a RTU (ready-to-use) format, see 97040-974 series. 

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Grade 934-AH™ RTU Glass Microfiber Filters, Whatman®

Ready-to-use (RTU) filters are supplied pre-washed and weighed according to standard method 2540D, eliminating the need for pre-treating the product prior to use. Each RTU filter is packaged within an aluminum pan with the filter weight clearly printed on a heat-resistant label. 

Binder-free, high-purity borosilicate glass microfiber filters are used in the determination of total suspended solids, removal of turbidity, and filtration of bacterial cultures as well as in a wide range of water monitoring applications. High loading capacity allows processing of very turbid samples. Provide superior fine particle retention (1.5μm) at high flow rates. Withstand temperatures up to 550°C (1022°F). 

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