CARBOXYLIC MULTI-WALLED CARBON NANOTUBES AS IMMOBILIZED STATIONARY PHASE IN CAPILLARY ELECTROCHROMATOGRAPHY

LORENA SOMBRA; YOLANDA MOLINER-MARTÍNEZ; SOLEDAD CÁRDENAS; MIGUEL VALCÁRCEL

ELECTROPHORESIS

Wiley

Lugar: 385; Año: 2008 vol. 29 p. 3850 - 3857

0173-0835

Carboxylic multi-walled carbon nanotubes (c-MWNT) have been immobilized into afused-silica capillary for capillary electrochromatography. The c-MWNT were successfullyincorporated after the silanization and coupling with glutaraldehyde on the inner surfaceof the capillary. The electrochromatographic features of the c-MWNT immobilizedstationary phase have been evaluated for the analysis of different compounds of pharmaceuticalinterest. The results indicated high electrochromatographic resolution, goodcapillary efficiency and retention factors. In addition, highly reproducible results betweenruns, days and capillaries were obtained.