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The temperature resistance makes Grade 169 well-suited for suspended solids determination
Grade 54 is also used in air pollution testing to determine gaseous compounds
This grade has similar performance properties to Grade 151 and is made with acid-treated borosilicate glass microfibers with inherently low levels of barium and zinc
Grade 131 is recommended for the collection of suspended solids in potable water and in industrial wastes
Low-Ash Hardened Paper - 3910-1100 - Grade 391, 11cm 1765 The temperature resistance makes GradeAhlstrom Munksj 391 2 3 m, Slow Speed This is a very fine retention filter for gravimetric analysis of very fine particles such as barium and lead sulfates, stannic and nickel sulfide, calcium oxalate and calcium fluoride.
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