3 33 mm Nylon Nylon with GF pre filter Nylon Hydrophilic PTFE Acetonitrile Blank 0.2 0.15 0.1 0.05 0 0 42 6810 Time, minutes Absorbance @ 214 nm, mAU 12 14 16 18 20 0.05 Acetonitrile Sample Preparation for Chromatography Non-sterile, low-extractable filters