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as described in EPA Method 1311
Grade 111 is used in general laboratory filtration including atmospheric and water pollution monitoring such as intake controls
which requires speedy filtration
Grade 74 is also used as a high purity filter for speedy filtering of trace elements such as silver chromate
Ahlstrom-Munksjö 131
Glass Microfiber Filter Paper - 1510-1100 - Grade 151, 11cm 12.50cm as described in EPA MethodAhlstrom Munksj 151 0. 7 m, Slow Speed This high performance grade is designed to retain extremely fine particles down to 0. 7 m. Grade 151 has retention comparable to membrane filter while providing high flow and loading capacity. Grade 151 is recommended for filtering fine precipitated proteins. In the filtration of nucleic acids and difficult biochemical solutions, Grade 151 is used in combination with Grade 141 as a highly efficient protective and
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