The CORTECS Premier C18+ Columns are general purpose, high efficiency C18 columns based on a solid-core particle that are designed to deliver excellent peak shape for basic analytes at low pH. CORTECS Premier Columns use MaxPeak High Performance Surface hardware technology which significantly reduces unwanted analyte/surface interactions that can lead to poor peak shape and losses in signal intensity. The VanGuard Fit column design protects the column from contaminants and increases column lifetime.