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A column of in-situ polymerized open-pore polyurethane (OPP) was evaluated for removing and concentrating linear alkylate sulfonate (LAS) from synthetic wastewater. The OPP can be used to remove LAS effectively from wastewater for purification as well as a preconcentration step prior to analysis. Preliminary results of comparisons of breakthrough capacities and elution rates for LAS on OPP, active carbon, and a macroreticular resin are presented.