Grade 54: 10 µm This fast filtering grade for the rapid filtration of coarse particles and gelatinous precipitates such as iron, zirconium and aluminum hydroxides amd cobalt sulfide. Ahlstrom 54 is also used in air pollution testing to determine gaseous compounds. It is recommended for fast analysis procedures for unstable precipitates such as silicon.
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Colonial Scientific has teamed up with the industry leaders, Fisher Scientific and VWR, and now offers their entire product line. Colonial Scientific provides any part from the Fisher Scientific site with a part number.