Capillary electrochromatography using columns packed with a supercritical fluid carrier

Capillary electrochromatography: A review

“…column and b change of EOF velocity from the column packing through the frit into an open capilw x lary. From the work of Knox 45 the formation of bubbles by heating would seem unlikely, and this conclusion is supported by some reports where high w x voltages have been used without pressurization 84 . w x Shariff 89 has shown that it is possible to use voltages up to 25 kV without bubble formation.…”

Design and evaluation of a new capillary electrochromatography system

“…This procedure is not only time-consuming but also hard to control. Supercritical fluids have been used by this group and others to pack columns [12,13]. The CEC columns used in this report were packed with supercritical carbon dioxide with a Lee Scientific SFC pump as shown in Fig.…”

Silica‐based monoliths for capillary electrochromatography: Methods of fabrication and their applications in analytical separations

“…5000 psi) by connecting the capillary to a slurry reservoir (containing the packing material suspended in organic solvent) connected to a high-pressure pump. In an attempt to produce more stable separation beds this procedure has been modified by using supercritical CO 2 as the transporting media [17,18]. One research group has made use of centripetal force to pack capillaries by placing the slurry reservoir in the center of a rotating packing apparatus [19,20].…”