Glass Microfiber Filter Paper - 1310-0470 - Grade 131, 4.70cm 4.70cm and comes with 250 sheets

and comes with 250 sheets per carton

Grade 151 has retention comparable to membrane filter while providing high flow and loading capacity

Grade 54 is also used in air pollution testing to determine gaseous compounds

Ahlstrom-Munksjö 169

as described in EPA Method 1311

Glass Microfiber Filter Paper - 1310-0470 - Grade 131, 4.70cm 4.70cm and comes with 250 sheetsAhlstrom Munksj 131 1. 0 m, Medium Speed This standard grade found in many environmental applications offers slightly more retention than Grade 111 with slightly lower filtration speed and loading capacity. Grade 131 is recommended for the collection of suspended solids in potable water and in industrial wastes. In biochemical tests, Grade 131 is suited for cell harvesting, liquid scintillation counting and the analysis of carbohydrates.