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EPA method 1311
Quartz meets the highest purity requirements due to the lowest possible heavy metal content
iron) found in heavy industries such as construction
Grade 161 is generally recommended for water pollution monitoring techniques for total suspended solids
Glass Microfiber Filter Paper - 1310-0425 - Grade 131, 4.25cm 4.70cm EPA method 1311Ahlstrom 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.
