Author(s)

Sabrina Flor¹, Juan Martin Huala¹, Valeria Tripodi^1,2, Silvia Lucangioli^1,2

¹Departamento de Tecnología Farmacéutica, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires, Argentina.
²Consejo Nacional de Investigación Científica y Tecnológica (CONICET), Buenos Aires, Argentina.

An amine capillary column was developed in a fused-silica capillary as stationary phase and applied to separation of basic compounds by capillary electrochromatography (CEC). The functionalized capillary was prepared by inmobilization of 3-Aminopropyl)triethoxysilane (APTES). The CEC conditions including APTES and buffer concentration, pH and applied voltage were investigated to obtain the optimal CEC system for the separation of three anesthetics as basic test molecules. The capillary column provided an efficiency of up to 20,000 plates/m. Lidocaine, ketamine and xilacine were baseline separated under the running conditions with 10 mM Na₂HPO₄ pH 9.0 as BGE. The applied voltage was 5 kV temperature was set at 25^oC and UV detection was performed. The resolutions were 4.97 and 1.53 for ketamine, lidocaine and xilacine, respectively. The column used in CEC mode showed better separation of the anesthetics compared with those used in the capillary zone mode. The comparison with reversed stationary phases used in HPLC in terms of resolution (Rs), sensitivity (LOD), efficiency (N), precision (RSD), asymmetry (T) was also performed. This study provided an alternative way for the CEC separation of basic compounds and demonstrated the improvement in the chromatographic parameters.

Electrochromatography, Basic Compounds, Functionalized Capillaries

Flor, S. , Huala, J. , Tripodi, V. and Lucangioli, S. (2015) Development of Amine Capillary Column Applied to the Analysis of Basic Compounds by Electrochromatography. Journal of Analytical Sciences, Methods and Instrumentation, 5, 66-73. doi: 10.4236/jasmi.2015.54008.