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Waters™ Ultrastyragel™ Preparative Columns are high-efficiency columns for Size Exclusion Chromatography (GPC). They are suitable for compound isolation and sample cleanup. The Ultrastyragel™ phases are based on cross-linked polystyrene-divinylbenzene with various pore-sizes. Closely related to Styragel™ GPC Columns, the family of Ultrastyragel™ Columns provides a two‒ to three-fold increase in efficiency (plates/meter) that improves separation speed and reduces solvent consumption for preparative isolation.