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as described in EPA Method 1311
This grade offers fine particle retention with high filtration speed and good loading capacity
zirconium and aluminum hydroxides
Ahlstrom-Munksjö offers sterile gridded membranes packed individually for use in colony counting
This grade has medium flow rate and good particle retention and is the most commonly used acid-washed filter
Glass Microfiber Filter Paper - 1210-0425 - Grade 121, 4.25cm 12.50cm as described in EPA MethodAhlstrom Munksj 121 1. 0 m, Medium Speed This very thick grade offers finer particle than Grade 111 with high wet strength and loading capacity. Grade 121 is recommended for the clarification of liquid suspensions loaded with fine particulates. Grade 121 is also used in membrane pre filtration and is also found in quantification of solids, and LSC (Liquid Scintillation Counting) techniques that require high loading capacity.
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