A wet-laid, porous solid phase extraction sheet material that contains both active particles and binder and that possesses excellent wet strength is described. The binder is present in a relatively small amount while the particles are present in a relatively large amount. The sheet material is sufficiently strong and flexible so as to be pleatable so that, for example, it can be used in a cartridge device.
The invention was made with Government support under Subcontract 203690-A-F1, with Battelle Memorial Institute, Pacific Northwest Laboratories, based on a Contract DE-AC06-76RLO-1830 awarded by the United States Department of Energy. The United States Government has certain rights in the invention.