Excess isotherms as a new way for characterization of the columns for reversed-phase liquid chromatography.
In this work, we present the excess isotherm of acetonitrile for stationary phases with different coverage density. Data obtained with the minor disturbance method were compared with (29)Si cross-polarization/magic-angle spinning NMR spectra to find dependence between acetonitrile adsorption on C18 chemically bonded stationary phases and coverage density of stationary phase. The preferential adsorption of acetonitrile on the bonded phase and the adsorption of water on the silica surface can be well correlated with the coverage density.
Buszewski
B
B
Department of Environmental Chemistry & Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Gagarin Street 7, 87-100 Toruń, Poland. bbusz@chem.uni.torun.pl
Bocian
Sz
S
Felinger
A
A
D000327:Adsorption; D002851:Chromatography, High Pressure Liquid / Q000295:instrumentation; D002853:Chromatography, Liquid / Q000295:instrumentation*; D009682:Magnetic Resonance Spectroscopy; D012822:Silicon Dioxide / Q000737:chemistry
D012822:Silicon Dioxide