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42 mm - 150 mm / 30 min is a medium thick paper is recommended for general applications with medium-heavy solute loading
Ahlstrom-Munksjö 74
Quartz meets the highest purity requirements due to the lowest possible heavy metal content
They can also be used for testing acidic gases which are not compatible with micro-glass fiber thimbles
Glass Microfiber Filter Paper - 1690-1100 - Grade 169, 11cm 52cm x 52cm 42 mm - 150 mmAhlstrom Munksj 169 1. 0 m, Fast Speed This glass microfiber grade is a smooth surface, binder free filter with unique high temperature resistance. It offers fine particle retention and product stability to over 500 degrees Centigrade. The temperature resistance makes Grade 169 well suited for suspended solids determination, volatile solids testing, air pollution testing, and related EPA and ASTM protocols. (100 circles box) Grade 169 for STM2540 E
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