Ahlstrom Filtration Grade 169 Pre-weighed Filter Paper, 47 cm dia

Ahlstrom offers a full range of glass microfiber filters manufactured from 100% pure borosilicate glass. Because of their intrinsic properties, glass microfiber filters have wide applications in many areas of laboratory analysis, especially when fine filtration and high loading capacity is required. Applications for Ahlstrom glass microfiber filters include environmental analysis for water, wastewater, testing of soils, air pollution and monitoring, research and process biochemistry and gravimetric analysis involving ignition of samples. Standard method 2450 for measuring solids in water calls for a glass filter disk without organic binder for some steps. It is important for this gravimetric test that the filter itself not change weight so that the solids can be accurately measured.

• Qualitative analysis
• Laboratory analysis
• 100% Pure borosilicate glass
• Rapid flow rate
• Fine particle retention 0.7 µm to 3.1 µm
• High loading capacity
• Chemical and thermal resistance (up to 500°C)
• Long shelf life
• Brilliant white color reflecting more than 96% of visible light
• Designed and formulated specifically to maintain a stable weight at 550°C
• Shows similar handling characteristics before and after 30 minutes in a 600°C furnace
• Can also be used for STM2540-D, -C and -B
• Directly comparable and substitutable for GE Whatman 934-AH™

• Specification Sheet /ASSETS/DOCUMENTS/ITEMS/EN/169W-0470.pdf