Whatman 1820-042 Glass Microfiber Binder Free Filter, 1.6 Micron, 4.3 s/100mL Flow Rate, Grade GF/A, 42.5mm Diameter (Pack of 100)

Grade GF/A: 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, foodstuff analyses, protein filtration and radioimmunoassay of weak ß emitters. Recommended for gravimetric determination of airborne particulates, stack sampling and absorption methods of air pollution monitoring. This filter is also available in the FilterCup and Disposable Filter Funnel formats. Properties: fast, high loading, Particle retention in liquid (µm): 1.6. Particle retention rating at 98 percent efficiency. Filtration speed herzberg (s): 62. Basis weight (g/m sq): 53.

• Extremely high flow rate; filtration takes place both vertically and laterally through the filters
• High loading capacity, which continues to filter efficiently for a greater extended period
• Most widely used in biochemistry for filtration of precipitated proteins
• Attains much higher counting efficiencies compared with cellulose papers; borosilicate glass without binders
• Withstands temperatures to 500°C