The TCC-ULP1 (5 × 23 mm) Ultralow Pressure Trace Cation Concentrator Column is designed primarily for high purity water analysis. The column strips ions from a measured volume of aqueous sample matrix, concentrating the analyte species, thereby lowering detection limits. The TCC-ULP1 is a general purpose, ultralow-pressure concentrator for use with syringe or autosampler loading (AS40, AS50, or AS autosamplers). The TCC-ULP1 can also be used with single-piston sample delivery pumps including the DXP-1 and DQP pumps. It is recommended for use with carboxylated columns such as the IonPac CS12, CS12A, CS14, CS15, CS16, CS17, and CS18 columns. The TCC-ULP1 can be used with sulfuric acid, methanesulfonic acid, and hydrochloric acid eluents. The column has a capacity of 260 µeq/column and a void volume of approximately 145 µL.