The filters feature fine particle retention for a range of liquid and air filtration applications. These have a nominal particle retention of 1.6µm at 98% efficiency and are suited for a variety of applications involving large sample volumes such as: Water and air pollution monitoring and wastewater filtering Foodstuff analysis Filtering of algae and bacteria cultures Protein filtration Radioimmunoassay of weak β emitters Gravimetric determination of airborne particulates Grade GF/A binder-free Whatman glass microfiber filters are available in a wide range of sizes in circles and sheets. Find the right particle retention rating and thickness for your analysis in the Whatman binder-free glass microfiber range.