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Short introduction to CEC

CEC is often looked upon as a hybrid method of micro-bore LC and CE. The technique consists of the application of an electric field over a capillary column that [Pg.377]

The stationary phase can he filled into the capillary, bonded as a film to the capillary walls (open tubular CEC) or introduced into the capillary as a suspension or solution of the mobile phase (pseudo-stationary phase). The separation is, in the case of neutrally charged analytes, based on partitioning between the stationary phase and the mobile phase or, in the case of charged analytes, based on both partitioning and electrophoretic mobility (charge to friction coefficient ratio). [Pg.379]

Since first demonstrated by Pretorius et al. in 1974 [19], CEC has emerged as a separation technique. CEC has since been applied by Jorgenson and Lukacs [20] in 1981 and by Tsuda et al. [21] in 1982 to analyse neutral compounds that could not be separated by capillary zone electrophoresis. Several aspects of CEC including applications, column preparation, instrumentation and detection have been focused upon and have recently been thoroughly reviewed [18,22-28]. [Pg.379]


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