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Dynamically modified capillary columns for liquid chromatographic separations of biological compounds
Journal of Chromatographic Science
|September 1, 1985
Summary
New capillary columns offer efficient separation of biological and clinical compounds. Cetyltrimethylammonium salts enable dynamic modification for versatile reversed-phase and ion-pair chromatography, with potential applications in drug analysis.
Area of Science:
- Analytical Chemistry
- Separation Science
Background:
- Open tubular capillary columns are crucial for high-resolution separations.
- Dynamic modification offers a flexible approach to tailoring stationary phases.
- Conventional reversed-phase chromatography faces limitations with charged analytes.
Purpose of the Study:
- To evaluate dynamically modified open tubular capillary columns for biological and clinical separations.
- To investigate the preparation and performance of these modified columns.
- To explore the potential application in separating antitumor drugs.
Main Methods:
- Preparation of small-diameter, dynamically modified capillary columns by adding cetyltrimethylammonium salts to the mobile phase.
- Evaluation of borosilicate and standard flint glasses with common etching procedures.
- Chromatographic separation of neutral and charged solutes.
Main Results:
- Dynamic modification was readily achieved by simple addition of cetyltrimethylammonium salts.
- Separations of neutral solutes were similar to conventional reversed-phase columns.
- Ion-pair reversed-phase separations were achieved for charged solutes.
Conclusions:
- Dynamically modified open tubular capillary columns provide versatile separation capabilities.
- These columns are suitable for both neutral and charged biological and clinical analytes.
- A potential clinical application exists for the separation of antitumor drugs using this technique.