LC is the most versatile analytical method to study complex mixtures. It can be used for many different separation applications in many fields of analysis. To achieve the best separation results, the right column choice is of utmost importance. SIELC columns are available in many different stationary phases to be used in regular HPLC and ultra-high-performance liquid chromatography (UHPLC), and deliver exceptional selectivity with outstanding lifetime and robustness. Reversed-phase, normal phase and mixed-mode HPLC columns, including Primesep, Obelisc, Sharc, Bist and Newcrom are designed and manufactured end-to-end by SIELC Technologies in the USA. The column manufacturing process includes multiple Quality Control (QC) tests on different stages of production so the column user is assured of rugged, reproducible performance with long column lifetime.