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Aqueous size exclusion chromatography is a powerful tool for determining of bio polymers like peptides, proteins and DNAs.TSK-GEL SW series is one of typical aqueous SEC columns for analyzing biological samples.The requirement of analyzing trace amounts of biological proteins increases in the proteome field to create new biological medicines and to explore new makers of diseases.To analysis trace amounts of proteins new SEC columns with high resolutions, high sensitivity and high recovery are needed.