ASPEC® C18 solid phase extraction (SPE) cartridges contain a high-quality, non-polar sorbent and are available in three volumes. With consistent flow rates, these SPE cartridges provide high loading capacity, accurate elution properties, and reproducible separation with low solvent usage. ASPEC pre-capped cartridges are “ASPEC instrument-ready”, saving you time by eliminating manual capping. These cartridges are also available uncapped.