Influence of the stationary and mobile phase composition in ideal chromatographic systems on the log k values in column chromatography. I. ODS/methanol-water system
On the basis of the literature data it was established that in the case of ODS column chromatography with methanol as modifier the value log xs/x1 (where xs and X1 denote methanol mole fractions in the stationary and the mobile phase, respectively) is a linear function of the corresponding...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Serbian Chemical Society
2000-01-01
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| Series: | Journal of the Serbian Chemical Society |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0352-5139/2000/0352-51390010725J.pdf |
| Summary: | On the basis of the literature data it was established that in the case of
ODS column chromatography with methanol as modifier the value log xs/x1
(where xs and X1 denote methanol mole fractions in the stationary and the
mobile phase, respectively) is a linear function of the corresponding
Bosch’s PmN parameter as well as of the log k value of the investigated
substances. It was also found that the phase equilibrium in the system
ODS/methanol-water is in accordance with the Everett’s equation for ideal
systems (K=10.88). Finally, a linear relationship between the log xs/x1
values and the volume fraction of methanol (φ) was found in the range of
0.5-1.0, which corresponds to the linear part of the function log k = f(φ),
established experimentally by other authors. |
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| ISSN: | 0352-5139 1820-7421 |