## Abstract A separation of four structurally similar steroids was performed on two calix[8]arene based stationary phases. It was observed that two of the steroids had a reversed retention order when the columns were changed. This implies that two different retention mechanisms are taking place whe
NMR Investigations of Stationary Phases
โ Scribed by Klaus Albert
- Publisher
- John Wiley and Sons
- Year
- 2003
- Weight
- 48 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0931-7597
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โฆ Synopsis
Abstract
For Abstract see ChemInform Abstract in Full Text.
๐ SIMILAR VOLUMES
Thermodynamic data, which are derived from measurements of separation factors at different temperatures for various chiral compounds, show some expected, but also some surprising effects concerning the mechanism of chiral recognition for the cyclodextrin derivatives investigated.
## Abstract Calixareneโbonded stationary phases received growing interest in HPLC as stationary phases with special retention characteristics and selectivity. The commercially available unsubstituted and __p__โ__tert__โbutylโsubstituted Caltrex^ยฎ^ columns have been intensively studied and character