[Applications of monoliths in sample preconcentration].

This review focuses on the use of monoliths in sample preconcentration, with emphasis on the development and applications of monolith preconcentration coupled to high performance liquid chromatography, capillary electrophoresis, capillary electrochromatography, and on microfluidic chips as well. Novel modes of monolith preconcentration developed in recent years are also presented. Sixty-five references have been cited.