CDS Empore C18-SD solid phase extraction (SPE) cartridges contain C18 bonded silica with a 50 μm particle size. These cartridges are designed for strong non-polar analyte extraction, offering a balance of retention strength and recovery performance. The material is end-capped to reduce polar interactions and is ideal for environmental, food safety, and chemical analysis applications. Available in both single-layer and dual-layer configurations to accommodate various analytical needs.