Use the TELOS polar (normal phase) SPE cartridges to retain analytes of interest or to remove polar interferences from the sample. Columns with Florisil® PR grade (magnesium silicate) sorbent have larger particle size than NH2 and are commonly used for lipid separation and pesticide extraction. All columns are made of polypropylene and feature female Luer-slip inlet and male Luer-slip outlet.