Estratégias de pré-concentração em eletroforese capilar: parte 2. Manipulação da velocidade da fase dispersa/secundária

Abstract

Recebido em 5/3/09; aceito em 7/7/09; publicado na web em 8/1/10 PRECONCENTRATION STRATEGIES IN CAPILLARY ELECTROPHORESIS. PART 2. MANIPULATION OF THE DISPERSE/ SECONDARY VELOCITY. This work describes CE preconcentration strategies based on the effect of manipulation of the disperse/ secondary velocity. Introduced by Terabe et al. in 1984, micellar electrokinetic chromatography is a powerful separation approach that increases the usage of electrokinetic phenomena for the separation of nonionic compounds. The main disadvantage of MEKC is the low concentration sensitivity associated with the limited optical path length for on-capillary photometric detection and the limited volume of sample solution that can be injected. This paper compiles on-line concentration strategies for neutral analytes by sample stacking and sweeping in micellar electrokinetic chromatography.