Ahlstrom 6090-3200 Qualitative Filter Paper, Grade 609, 320 mm, 100/pk

Ahlstrom Grade 609 filter paper is primarily used for medium-speed qualitative filtration in laboratory and industrial applications. It is especially suitable for protein analysis in beverages like beer, as well as general liquid clarification where consistent purity is required.

This grade provides approximately 4 µm particle retention with a medium flow rate, making it ideal for balancing filtration speed and clarity. It performs well when separating fine to moderately sized particles without significantly slowing down processing time.

Grade 609 is manufactured with extremely low iron and nitrogen content, which helps prevent contamination during sensitive tests such as protein analysis in beer. This ensures more accurate and reliable laboratory results compared to standard filter papers.

Yes, Ahlstrom Grade 609 is widely used in routine qualitative analysis, including liquid clarification, sample preparation, and filtration of non-critical precipitates. Its high-purity cellulose composition ensures consistent and reproducible performance across applications.

The 320 mm diameter refers to the size of the filter paper circle, making it ideal for large-volume filtration or use in bigger funnels and industrial setups. Choosing the correct diameter ensures proper fit, efficient filtration, and minimal sample loss during processing.