C18zip

Repeat this cycle to maximize binding to the C18 media. Note: Slow, consistent pipetting is key for high recovery. 5. Washing (Desalting) Aspirate the Wash Solution (0.1% TFA). Dispense to waste. Repeat 3 times to remove salts, buffers, and detergents. 6. Elution Aspirate the Elution Solution (e.g., 60% ACN/0.1% TFA).

Dispense the liquid into a clean, sterile microcentrifuge tube.

Peptides dissolved in 0.1% Trifluoroacetic acid (TFA). Wetting Solution: 100% Acetonitrile (ACN). Equilibration/Wash Solution: 0.1% TFA in water.

Repeat . This prepares the resin to bind the peptides. 4. Sample Binding

50–70% ACN in 0.1% TFA (depending on peptide hydrophobicity). 2. Wetting the Tip Set your pipette to 10 µL. Aspirate the Wetting Solution (100% ACN) into the tip. Dispense to waste. Repeat 2 times . This activates the C18 resin. 3. Equilibration Aspirate the Equilibration Solution (0.1% TFA). Dispense to waste.

Aspirate and dispense your peptide sample through the ZipTip.

The sample is now ready for (MALDI-TOF or LC-MS/MS).