Characterization of the surface properties of Mg/Al oxides by the solvation parameter model.
J Chromatogr A
; 1115(1-2): 58-63, 2006 May 19.
Article
en En
| MEDLINE
| ID: mdl-16530209
The oxides of different Mg/Al ratios (Mg/Al = 0, 0.1, 5, 10 and infinity) were prepared, and the characterization of these oxides was attempted by estimating characteristic interaction parameters based on the solvation parameter model. The magnitudes of the regression coefficients varied with the increase of Mg/Al ratio. For the oxide of Mg/Al = 0.1 and Al2O3, the contribution of these characteristic interactions for solutes' retention was similar to that of the common silica, and the dipolarity/polarizability (pi*), the solute hydrogen bond donating (alpha2(H)) and accepting (beta2(H)) abilities played an important role. Yet, the retention behavior at a higher Mg/Al ratio (Mg/Al = 5, 10 and MgO) drastically changes, and V(i)/100 (the intrinsic molar volume), pi*, alpha2(H) and beta2(H) all favored the solutes retention. By comparison of the regression coefficients on various normal-phase (NP) and reversed-phase (RP) columns, a new model was developed to correlate the solute retention factors on Mg/Al = 5, 10 and MgO columns with the data of NP and RP columns.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Propiedades de Superficie
/
Óxido de Aluminio
/
Óxido de Magnesio
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
J Chromatogr A
Año:
2006
Tipo del documento:
Article
País de afiliación:
China
Pais de publicación:
Países Bajos