Capillary electrophoresis and open tubular capillary electrochromatography using a magnesia–zirconia coated capillary

Analytical separations in open‐tubular capillary electrochromatography

“…In OT-CEC, there are six general approaches used for modifying the capillary column. These include (i) adsorption, (ii) covalent bonding and/or cross-linking, (iii) porous silica layers, (iv) chemical bonding after etching, (v) sol-gel, and (vi) molecular imprinting [28][29][30][31][80][81][82][83]. Although OT-CEC is considered an alternative to packed-CEC, its phase ratio and sample capacity are relatively low due to the typical small surface area of the coating.…”

“…Several options have been proposed to increase the surface area, and therefore, to increase the interactions between the analyte and the coated phase. These options include polymer coatings, porous silica layers, etching, and sol-gel techniques [11,30,78,83].…”

Electrophoretic and electrochromatographic properties of zirconia based capillaries

“…A stationary phase was created on the inner surface of the zirconia modified capillary using the high affinity of the zirconia surface for phosphate groups [6]. A 20 ixm ID capillary was flushed with 1 M n-dodecyl phosphate (nDP) solution in heptane for 1 h, and then the excess of reactant was flushed with heptane for 1 h.…”

Enantioseparation of Neutral Compounds on a Quinine Carbamate-Immobilized Zirconia in Reversed-Phase Capillary Electrochromatography

“…Zirconia-based stationary phases have been increasingly used in CEC separations recently. [35][36][37][38][39][40][41][42][43] To our knowledge enantioseparation of non-acidic, neutral compounds on QNZ by RP-CEC has not been reported while QNZ was used for enantioseparation of acidic chiral compounds by RPLC. [44][45][46] Influences of pH, acetonitrile content, composition of the buffer and applied voltage on enantioseparation were examined.…”