6mL cartridges with a 500/500 mg/mg bed weight. 30 Pack. This dual phase SPE cartridge does what you want it to do: Sorb matrix and not pesticides. This phase has shown a high recovery of planar species without the use of toluene. C18 is endcapped.
40 PCS of FEP columns (12 mm ID x 12 in) with internal volume of 20 mL packed with 0.5 g CarbonX COF with deactivated glass wool top and bottom “frits”. No Celite required. FEP is sealed on both ends to prevent deactivation.