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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Chromatographia 15 (1982), S. 205-214 
    ISSN: 1612-1112
    Keywords: Solubility parameter ; Theory of liquid chromatography ; Retention ; Selectivity ; Specific effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The solubility parameter concept is briefly discussed. It is then used to explain some of the current features of liquid partition and adsorption chromatography. Various phase systems are discussed on the basis of three characteristics.retention, selectivity (the general separation power of a system) andspecificity (increased separation power towards certain pairs of solutes). The emergence of two essentially different techniques, the ‘normal phase’ and ‘reversed phase’ modes, will appear as a logical consequence of simplified theory. It also becomes obvious why ‘reversed phase’ applications are so much more numerous. Some suggestions are given for the development of new stationary phases and the improvement of existing ones. The usefulness of the solubility parameter concept to predict the solvent strength of mixed eluents in reversed phase liquid chromatography (RPLC) is demonstrated. Some practical rules for the selection and operation of stationary and mobile phase systems are formulated.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Chromatographia 15 (1982), S. 387-398 
    ISSN: 1612-1112
    Keywords: Solubility parameter ; Theory of liquid chromatography ; Retention ; Selectivity ; Specific effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Das Konzept des Löslichkeitsparameters wird kurz diskutiert. Danach wird es benutzt, um einige Erscheinungen der Flüssig/Flüssig-Verteilungs-(LLC) und Adsorptions-Chromatographie (LSC) zu erklären. Es werden unterschiedliche Phasensysteme bezüglich dreier charakteristischer Erscheinungen besprochen:Retention, Selektivität (erhöhte Trennkraft eines Systems) undSpezifität (erhöhte Trennkraft für bestimmte Substanzpaare). Die Erscheinung zweier wesentlich unterschiedlicher Techniken, der Normalphasen- und der Umkehrphasen-Technik, ergibt sich als logische Konsequenz der vereinfachten Theorie. Es wird auch klar, warum die Reversed Phase. Anwendungen sehr viel zahlreicher als die übrigen sind. Es werden einige Anregungen zur Entwicklung neuer stationärer Phasen und der Verbesserung der bereits bestehenden gegeben. Es wird dargestellt, wie nützlich das Löslichkeitsparameter-Konzept zur Vorhersage der Lösemittelstärke von Lösemittelgemischen in der Umkehrphasen-Chromatographie ist. Zum Schluß werden einige praktische Regeln zur Auswahl und dem Betrieb von stationären und mobilen Phasensystemen formuliert.
    Notes: Summary The solubility parameter concept is briefly discussed. It is then used to explain some of the current features of liquid partition and adsorption chromatography. Various phase systems are discussed on the basis of three characteristics:retention, selectivity (the general separation power of a system) andspecificity (increased separation power towards certain pairs of solutes). The emergence of two essentially different techniques, the ‘normal phase’ and ‘reversed phase’ modes, will appear as a logical consequence of simplified theory. It also becomes obvious why ‘reversed phase’ applications are so much more numerous. Some suggestions are given for the development of new stationary phases and the improvement of existing ones. The usefulness of the solubility parameter concept to predict the solvent strength of mixed eluents in reversed phase liquid chromatography (RPLC) is demonstrated. Some practical rules for the selection and operation of stationary and mobile phase systems are formulated.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
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