These guard cartridges prolong column life by filtering particulates, contaminants and strongly bound sample components from the sample and mobile phase.

• Replaceable, disposable heads
• Can be used for sample preconcentration
• Prolong column life through additional filtering
• Negligible loss of efficiency
• Little effect on retention or resolution

They act as replaceable, disposable heads of analytical columns with negligible loss of efficiency and little effect on retention or resolution. Can be used for sample preconcentration when connected to sample injection loop. Packed with Aquapore® 7 µm spherical sorbent. I.D×L: 3.2×15 mm.