This method validation kit consists of three XSelect CSH Fluoro-Phenyl columns packed with three different batches of sorbent. Designed to maximize selectivity differences, the XSelect CSH Fluoro-Phenyl column provides you with maximum method development freedom, especially when using low pH mobile phases. The non-encapped sorbent provides you with enhanced retention of acidic compounds. Packed in ultra-low dispersion hardware, 2.5 µm eXtended Performance [XP] columns enable exceptional separation performance, robustness and throughput for HPLC assays while enabling a seamless transition path toward UPLC adoption.