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" Microsep Advance centrifugal filters provide precise, quick recovery of microliter volumes. -Quick recovery -50X concentration -Built-in dead stop feature -Color coded Microsep Advance centrifugal filters can achieve 50X concentration and > -90% recovery. Built-in dead feature prevents samples from spinning to dryness. Filters are color coded and laser etched for easy identification. Ultrafiltration units are ideal for concentration of dilute protein samples prior to electrophoresis. Recover biomolecules from cell culture supernatants or lysates. The microfiltration devices are ideal for clarifying samples with large particulate, or to remove particulate from samples for HPLC analysis of drugs, amino acids, and antibodies. Filter medium of Microsep is Omega (modified polyethersulfone) and Supor polyethersulfone.For smaller samples use Pall Life Sciences Nanosep centrifuge filters. For larger samples use Pall Life Sciences Macrosep or Jumbosep centrifugal filter."