![]() The entire stationary phase (alkyltrimethylammonium surfactant) is removed along with the analyte during the elution step. ![]() The sorbent material now has a better ability to extract hydrophobic molecules from aqueous samples. The original hydrophilic cation-exchange resin is made hydrophobic by covering the surface with alkyl chains from the hydrophobic portion of the surfactant. ![]() Presented is a solid-phase extraction sorbent material composed of cationic alkyltrimethylammonium surfactants attached to a strong cation-exchange resin via ion- exchange. Reid, Kendra R Kennedy, Lonnie J Crick, Eric W Conte, Eric D Solid-phase extraction sorbent consisting of alkyltrimethylammonium surfactants immobilized onto strong cation-exchange polystyrene resin.
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