Retention Mechanism: Normal phase Sample Matrix Compatibility: Organic solvents, oils, and lipids • Unbonded acid washed silica sorbent ideal for normal phase SPE and other modified flash techniques • Often used to separate or remove structurally similar molecules through successive elutions with increasingly polar solutions • The most polar normal phase sorbent available • Excellent capacity for purifying solution phase combinatorial chemistry reactions when removing target molecules from reaction by-products and excess reagents • Available in Büchner Funnel configurations for easy scalability