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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Chromatographia 14 (1981), S. 439-444 
    ISSN: 1612-1112
    Keywords: Flow rate ; Packed columns ; Open tubular columns ; Chromatographic permeability ; Column resistance factor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary It is shown that the flow in chromatography is nearly always laminar in nature. Starting from the Darcy equation, expressions are given for the flow rate in both gas and liquid chromatography columns. The concepts of specific permeability, chromatographic permeability and column resistance factor are discussed for packed as well as open tubular columns. The experimental determination of all these factoers is demonstrated. The influence of the shape and pore volume of porous and non-porous supports on the column resistance factor and the chromatographic permeability is discussed.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Chromatographia 14 (1981), S. 547-553 
    ISSN: 1612-1112
    Keywords: Flow rate ; Packed columns ; Open tubular columns ; Chromatographic permeability ; Column resistance factor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es wird gezeigt, daß in der Chromatographie die Strömung fast durchweg laminaren Charakter hat. Ausgehend von der Darcy-Gleichung werden sowohl für Gas-Chromatographische Trennsäulen als auch für Flüssig-Chromatographische Trennsäulen Ansätze für die Strömungsgeschwindigkeit entwickelt. Konzepte für die spezifische Permeabilität, die chromatographische Permeabilität und den Säulen-Widerstandsfaktor werden sowohl für gepackte- als auch für Kapillarsäulen diskutiert. Die experimentelle Bestimmung der oben genannten Einflußgrößen wird gezeigt. Der Einfluß der Form und des Porenvolumens poröser und nichtporöser Trägermaterialien auf den Säulen-Widerstandsfaktor und auf die chromatographische Permeabilität werden besprochen.
    Notes: Summary It is shown that the flow in chromatography is nearly always laminar in nature. Starting from the Darcy equation, expressions are given for the flow rate in both gas and liquid chromatography columns. The concepts of specific permeability, chromatographic permeability and column resistance factor are discussed for packed as well as open tubular columns. The experimental determination of all these factors is demonstrated. The influence of the shape and pore volume of porous and non-porous supports on the column resistance factor and the chromatographic permeability is discussed.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
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