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Dursan® "Metal Free" HPLC Column Hardware for Cogent HPLC Columns.
MicroSolv Technology Corp.The Dursan surface treatment uses a functionalized, silica-like coating for stainless steel frits and column tubes. The coating is very robust and thin (~400 - 1600nm) that modifies the contact surface your analytes meet to be metal-free and somewhat hydrophobic.