Whatman 1825-047 Filter Circles, 47mm Dia, Binder Free Grade GF/F, 100/pk (PN:1825-047)

Whatman Grade GF/F filter circles are binder-free glass microfiber filters designed for high-efficiency filtration in lab settings. They are commonly used for DNA binding and purification, protein clarification, and biochemical solution filtering, as well as applications like environmental testing.

These filter circles have a nominal particle retention of ~0.7 µm, meaning they can effectively capture very fine particles while still allowing rapid fluid flow — ideal for fine particulate analysis and clarification workflows.

Binder-free glass microfiber filters are made from pure borosilicate glass fibers rather than cellulose and chemical binders. This gives them higher temperature tolerance, stronger chemical resistance, and greater loading capacity compared with standard filter papers, making them better for demanding lab filtrations.

Yes — the pure glass microfiber construction allows these filters to remain stable at elevated temperatures (up to ~500 °C) and perform well in processes involving heat or ignition, such as gravimetric analysis after drying or ashing.

The 47 mm diameter is a widely used size that fits standard funnel and filter holders in many laboratories, making it a convenient choice for routine filtrations, environmental assays, and quality control workflows that require consistent and reproducible filtration performance.