high-performance liquid chromatography (HPLC), can be used to identify the purity of a combinatorial library, but assays need to be rapid with good resolution for all components to provide useful information for the chemist. The introduction of surfactant to traditional capillary electrophoresis instrumentation has dramatically expanded the scope of analytes that can be separated by capillary electrophoresis. MEKC can also be used in routine quality control of antibiotics in pharmaceuticals or feedstuffs. References Sources Kealey, D.;Haines P.J.; instant notes, Analytical Chemistry page 182-188 Chromatography