The PFAS delay column is installed between the mixer and autosampler to trap system-related PFAS, preventing interference and ensuring accurate trace-level analysis of PFAS in samples. The highly retentive and high-capacity stationary phase retains system-related PFAS with no breakthrough, even with extended equilibration times. Compatible with any HPLC or UHPLC up to 15,000 psi, and with any phase of SPP or FPP analytical column. For use with mobile phase pH 2-8. Easy installation with standard fittings (high pressure PEEK fittings 220-91522-07 or EXP hand-tight fittings 220-91522-35 (ea) or 220-91522-36 (10/pk) are recommended.) Recommended for EPA 1633.