期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1210, 期 2, 页码 154-159出版社
ELSEVIER
DOI: 10.1016/j.chroma.2008.09.069
关键词
Electrochemically modulated liquid chromatography (EMLC); Boron-doped diamond powder (BDDP); Porous graphitic carbon (PGC); Applied potential (E-appl); Stationary phase
资金
- University of Utah USTAR Initiative
- Biodesign Institute of Arizona State University
- Iowa State University [DE-AC 02-OZH11358]
- Fraunhofer Center for Coatings and Laser Applications at MSU
This paper reports on preliminary tests of the performance of boron-doped diamond powder (BDDP) as a stationary phase in electrochemically modulated liquid chromatography (EMLC). EMLC manipulates retention through changes in the potential applied (E-appl) to a conductive packing. Porous graphitic carbon (PGC) has routinely been utilized as a material in EMLC separations. Herein the utility of BDDP as a stationary phase in EMLC was investigated and its stability, both compositionally and microstructurally, relative to PGC was compared. The results show that BDDP is stable over a wide range of E-appl, values (i.e., -1.2 to +1.2V vs. Ag/AgCl, sat'd NaCl). The data also reveal that electrostatics play a key role in the adsorption of the aromatic sulfonates on the BDDP stationary phase, and that these analytes are more weakly retained in comparison to the PGC support. The potential for this methodology to provide a means to advance the understanding of molecular adsorption and retention mechanisms on carbonaceous materials is briefly discussed. (c) 2008 Elsevier B.V. All rights reserved.
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