The effect of the surface area on the separation in gas-liquid partition chromatography\* During the evaluation of a new instrument\*\* for the determination of specific surface areas, the surface area of five chromatographic support materials were measured. These data led us to investigate the dif
The effect of the geometrical structure and the surface chemistry of silica gels on separations in liquid-solid chromatography
โ Scribed by N.P. Lebedeva; I.I. Frolov; Ya.I. Yashin
- Publisher
- Elsevier Science
- Year
- 1971
- Tongue
- English
- Weight
- 463 KB
- Volume
- 58
- Category
- Article
- ISSN
- 1873-3778
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โฆ Synopsis
The effect of the geometrical structure of silica gels on retention volumes, band broadening and separation has been investigated. The retention times of nitrobenzene, aniline, diphenylamine and nitronaphthalene on hydrosylated and dehydroxylated silica gels have been measured. It has been shown that, fey amilytical purposes and taking into account the analysis time, it is preferable to use temperature programming of the column.
๐ SIMILAR VOLUMES
The fluorescence and fluorescence-excitation spectra of adsorbed pyrene on a silica gel surface at low surface coverage have been observed. Pyrene exists as a monomer and dimer in its ground state on a silica gel surface when adsorption occurs from cyclohexane solution. Based on the fluorescence-exc