SPE cartridge with PSA (primary secondary amine) adsorbent for mixed-mode use: nomal or revered-phase as well as weak anion excnange (WAX). For common sample matrices such as food, soil, water, and petroleum. 6mL, 500mg bed stable over pH range 2-9. Polypropylene body with polyethylene frits. May be processed by any one or all of these techniques: positive pressure, sidearm flask, centrifuge, or vacuum manifold. Replacement for REST-26195