Whatman Glass Fiber Filters
Grade 691 is a reliable and dependable addition to
the Whatman Filters
family of products. Combining top-notch and uncompromising quality with an affordable price, the Whatman Glass Fiber Filters Grade 691 28333-125/ 28333-125
can fulfill your laboratory needs while still offering a great value for the money.
Product Category Description:
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 sea water. Also used in RIA procedures and for harvesting lymphocytes during incorporation trials.